diff --git a/L2J_Mobius_01.0_Ertheia/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_01.0_Ertheia/java/org/l2jmobius/gameserver/GameServer.java
index aada4979c5..6b3e3beda7 100644
--- a/L2J_Mobius_01.0_Ertheia/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_01.0_Ertheia/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -112,7 +110,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -128,6 +125,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -470,24 +468,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()
diff --git a/L2J_Mobius_02.5_Underground/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_02.5_Underground/java/org/l2jmobius/gameserver/GameServer.java
index 3239ddc61a..44187d3dbe 100644
--- a/L2J_Mobius_02.5_Underground/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_02.5_Underground/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -116,7 +114,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -132,6 +129,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -478,24 +476,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()
diff --git a/L2J_Mobius_03.0_Helios/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_03.0_Helios/java/org/l2jmobius/gameserver/GameServer.java
index 3239ddc61a..44187d3dbe 100644
--- a/L2J_Mobius_03.0_Helios/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_03.0_Helios/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -116,7 +114,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -132,6 +129,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -478,24 +476,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()
diff --git a/L2J_Mobius_04.0_GrandCrusade/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_04.0_GrandCrusade/java/org/l2jmobius/gameserver/GameServer.java
index 3c6e3a7baf..df8d48956b 100644
--- a/L2J_Mobius_04.0_GrandCrusade/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_04.0_GrandCrusade/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -116,7 +114,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -132,6 +129,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -478,24 +476,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()
diff --git a/L2J_Mobius_05.0_Salvation/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_05.0_Salvation/java/org/l2jmobius/gameserver/GameServer.java
index 9ca168f5b1..d447320703 100644
--- a/L2J_Mobius_05.0_Salvation/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_05.0_Salvation/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -118,7 +116,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -134,6 +131,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -482,24 +480,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()
diff --git a/L2J_Mobius_05.5_EtinasFate/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_05.5_EtinasFate/java/org/l2jmobius/gameserver/GameServer.java
index 9ca168f5b1..d447320703 100644
--- a/L2J_Mobius_05.5_EtinasFate/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_05.5_EtinasFate/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -118,7 +116,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -134,6 +131,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -482,24 +480,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()
diff --git a/L2J_Mobius_06.0_Fafurion/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_06.0_Fafurion/java/org/l2jmobius/gameserver/GameServer.java
index d29933f294..fa8cc0d698 100644
--- a/L2J_Mobius_06.0_Fafurion/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_06.0_Fafurion/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -119,7 +117,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -135,6 +132,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -484,24 +482,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()
diff --git a/L2J_Mobius_07.0_PreludeOfWar/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_07.0_PreludeOfWar/java/org/l2jmobius/gameserver/GameServer.java
index e68f79dfeb..fd0ba456ce 100644
--- a/L2J_Mobius_07.0_PreludeOfWar/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_07.0_PreludeOfWar/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -121,7 +119,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -137,6 +134,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -490,24 +488,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()
diff --git a/L2J_Mobius_08.2_Homunculus/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_08.2_Homunculus/java/org/l2jmobius/gameserver/GameServer.java
index 5c44b0b63e..7ea022ff2a 100644
--- a/L2J_Mobius_08.2_Homunculus/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_08.2_Homunculus/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -121,7 +119,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -137,6 +134,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -490,24 +488,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()
diff --git a/L2J_Mobius_09.2_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_09.2_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/GameServer.java
index 778b82f7bf..85a2b49ea9 100644
--- a/L2J_Mobius_09.2_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_09.2_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -122,7 +120,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -138,6 +135,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -492,24 +490,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()
diff --git a/L2J_Mobius_10.0_MasterClass/java/org/l2jmobius/gameserver/GameServer.java b/L2J_Mobius_10.0_MasterClass/java/org/l2jmobius/gameserver/GameServer.java
index 15f9047f4c..6a040af66e 100644
--- a/L2J_Mobius_10.0_MasterClass/java/org/l2jmobius/gameserver/GameServer.java
+++ b/L2J_Mobius_10.0_MasterClass/java/org/l2jmobius/gameserver/GameServer.java
@@ -22,8 +22,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.lang.management.ManagementFactory;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
 import java.time.Duration;
 import java.util.Calendar;
 import java.util.logging.Level;
@@ -124,7 +122,6 @@ import org.l2jmobius.gameserver.instancemanager.CastleManager;
 import org.l2jmobius.gameserver.instancemanager.CastleManorManager;
 import org.l2jmobius.gameserver.instancemanager.ClanEntryManager;
 import org.l2jmobius.gameserver.instancemanager.ClanHallAuctionManager;
-import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.CursedWeaponsManager;
 import org.l2jmobius.gameserver.instancemanager.CustomMailManager;
 import org.l2jmobius.gameserver.instancemanager.DBSpawnManager;
@@ -140,6 +137,7 @@ import org.l2jmobius.gameserver.instancemanager.GrandBossManager;
 import org.l2jmobius.gameserver.instancemanager.IdManager;
 import org.l2jmobius.gameserver.instancemanager.InstanceManager;
 import org.l2jmobius.gameserver.instancemanager.ItemAuctionManager;
+import org.l2jmobius.gameserver.instancemanager.ItemCommissionManager;
 import org.l2jmobius.gameserver.instancemanager.ItemsOnGroundManager;
 import org.l2jmobius.gameserver.instancemanager.MailManager;
 import org.l2jmobius.gameserver.instancemanager.MapRegionManager;
@@ -496,24 +494,6 @@ public class GameServer
 		LoginServerThread.getInstance().start();
 		
 		Toolkit.getDefaultToolkit().beep();
-		
-		// TODO: Remove this.
-		// Old dualclass system adjustment.
-		if (!GlobalVariablesManager.getInstance().getBoolean("DUALCLASS_SYSTEM_UPDATED", false))
-		{
-			GlobalVariablesManager.getInstance().set("DUALCLASS_SYSTEM_UPDATED", true);
-			try (Connection con = DatabaseFactory.getConnection();
-				PreparedStatement ps1 = con.prepareStatement("DELETE from character_variables WHERE var='KNOWN_DUAL_SKILLS'");
-				PreparedStatement ps2 = con.prepareStatement("DELETE from character_skills WHERE skill_id in (19222, 19223, 19224, 19225, 19226, 19229, 19290)"))
-			{
-				ps1.execute();
-				ps2.execute();
-			}
-			catch (Exception e)
-			{
-				LOGGER.warning(e.getMessage());
-			}
-		}
 	}
 	
 	public long getStartedTime()