diff --git a/L2J_Mobius_HighFive/dist/game/data/scripts/custom/RaidbossInfo/RaidbossInfo.java b/L2J_Mobius_HighFive/dist/game/data/scripts/custom/RaidbossInfo/RaidbossInfo.java
index c54e967f72..171e458087 100644
--- a/L2J_Mobius_HighFive/dist/game/data/scripts/custom/RaidbossInfo/RaidbossInfo.java
+++ b/L2J_Mobius_HighFive/dist/game/data/scripts/custom/RaidbossInfo/RaidbossInfo.java
@@ -41,7 +41,7 @@ public final class RaidbossInfo extends Quest
 	{
 		31729, 31730, 31731, 31732, 31733, 31734, 31735, 31736, 31737, 31738,
 		31739, 31740, 31741, 31742, 31743, 31744, 31745, 31746, 31747, 31748,
-		31749, 31750, 31751, 31752, 31753, 31754, 31755, 31756, 31757, 31758,
+		31750, 31751, 31752, 31755, 31756, 31757, 31758,
 		31759, 31760, 31761, 31762, 31763, 31764, 31765, 31766, 31767, 31768,
 		31769, 31770, 31771, 31772, 31773, 31774, 31775, 31776, 31777, 31778,
 		31779, 31780, 31781, 31782, 31783, 31784, 31785, 31786, 31787, 31788,
diff --git a/L2J_Mobius_HighFive/dist/game/data/scripts/instances/DarkCloudMansion/DarkCloudMansion.java b/L2J_Mobius_HighFive/dist/game/data/scripts/instances/DarkCloudMansion/DarkCloudMansion.java
index e18ea54519..0af8b4ea82 100644
--- a/L2J_Mobius_HighFive/dist/game/data/scripts/instances/DarkCloudMansion/DarkCloudMansion.java
+++ b/L2J_Mobius_HighFive/dist/game/data/scripts/instances/DarkCloudMansion/DarkCloudMansion.java
@@ -92,8 +92,8 @@ public final class DarkCloudMansion extends AbstractInstance
 		18375,
 		18376,
 		18377,
-		22318,
-		22319,
+		// 22318,
+		// 22319,
 		22272,
 		22273,
 		22274,
diff --git a/L2J_Mobius_HighFive/java/com/l2jmobius/gameserver/model/events/AbstractScript.java b/L2J_Mobius_HighFive/java/com/l2jmobius/gameserver/model/events/AbstractScript.java
index 6450b74e05..396f35c1eb 100644
--- a/L2J_Mobius_HighFive/java/com/l2jmobius/gameserver/model/events/AbstractScript.java
+++ b/L2J_Mobius_HighFive/java/com/l2jmobius/gameserver/model/events/AbstractScript.java
@@ -308,6 +308,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setAttackableKillId(Consumer<OnAttackableKill> callback, int... npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addKillId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_ATTACKABLE_KILL, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -319,6 +326,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setAttackableKillId(Consumer<OnAttackableKill> callback, Collection<Integer> npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addKillId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_ATTACKABLE_KILL, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -367,6 +381,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcFirstTalkId(Consumer<OnNpcFirstTalk> callback, int... npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addFirstTalkId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_NPC_FIRST_TALK, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -378,6 +399,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcFirstTalkId(Consumer<OnNpcFirstTalk> callback, Collection<Integer> npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addFirstTalkId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_NPC_FIRST_TALK, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -390,6 +418,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcTalkId(Collection<Integer> npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addTalkId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerDummy(EventType.ON_NPC_TALK, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -400,6 +435,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcTalkId(int... npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addTalkId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerDummy(EventType.ON_NPC_TALK, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -436,6 +478,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcQuestStartId(int... npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addStartNpc for non existing NPC: " + id + "!");
+			}
+		}
 		return registerDummy(EventType.ON_NPC_QUEST_START, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -446,6 +495,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcQuestStartId(Collection<Integer> npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addStartNpc for non existing NPC: " + id + "!");
+			}
+		}
 		return registerDummy(EventType.ON_NPC_QUEST_START, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -459,6 +515,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcSkillSeeId(Consumer<OnNpcSkillSee> callback, int... npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addSkillSeeId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_NPC_SKILL_SEE, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -470,6 +533,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcSkillSeeId(Consumer<OnNpcSkillSee> callback, Collection<Integer> npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addSkillSeeId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_NPC_SKILL_SEE, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -483,6 +553,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcSkillFinishedId(Consumer<OnNpcSkillFinished> callback, int... npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addSpellFinishedId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_NPC_SKILL_FINISHED, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -494,6 +571,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcSkillFinishedId(Consumer<OnNpcSkillFinished> callback, Collection<Integer> npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addSpellFinishedId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_NPC_SKILL_FINISHED, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -507,6 +591,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcSpawnId(Consumer<OnNpcSpawn> callback, int... npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addSpawnId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_NPC_SPAWN, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -518,6 +609,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setNpcSpawnId(Consumer<OnNpcSpawn> callback, Collection<Integer> npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addSpawnId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_NPC_SPAWN, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -767,6 +865,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setAttackableAttackId(Consumer<OnAttackableAttack> callback, int... npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addAttackId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_ATTACKABLE_ATTACK, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -778,6 +883,13 @@ public abstract class AbstractScript extends ManagedScript
 	 */
 	protected final List<AbstractEventListener> setAttackableAttackId(Consumer<OnAttackableAttack> callback, Collection<Integer> npcIds)
 	{
+		for (int id : npcIds)
+		{
+			if (NpcData.getInstance().getTemplate(id) == null)
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found addAttackId for non existing NPC: " + id + "!");
+			}
+		}
 		return registerConsumer(callback, EventType.ON_ATTACKABLE_ATTACK, ListenerRegisterType.NPC, npcIds);
 	}
 	
@@ -1972,11 +2084,11 @@ public abstract class AbstractScript extends ManagedScript
 	public static int getEnchantLevel(L2PcInstance player, int itemId)
 	{
 		final L2ItemInstance enchantedItem = player.getInventory().getItemByItemId(itemId);
-		if (enchantedItem != null)
+		if (enchantedItem == null)
 		{
-			return enchantedItem.getEnchantLevel();
+			return 0;
 		}
-		return 0;
+		return enchantedItem.getEnchantLevel();
 	}
 	
 	/**
diff --git a/L2J_Mobius_HighFive/java/com/l2jmobius/gameserver/model/quest/Quest.java b/L2J_Mobius_HighFive/java/com/l2jmobius/gameserver/model/quest/Quest.java
index 721d57ecec..a98d654ddc 100644
--- a/L2J_Mobius_HighFive/java/com/l2jmobius/gameserver/model/quest/Quest.java
+++ b/L2J_Mobius_HighFive/java/com/l2jmobius/gameserver/model/quest/Quest.java
@@ -35,6 +35,7 @@ import java.util.logging.Level;
 import com.l2jmobius.Config;
 import com.l2jmobius.commons.database.DatabaseFactory;
 import com.l2jmobius.gameserver.cache.HtmCache;
+import com.l2jmobius.gameserver.datatables.ItemTable;
 import com.l2jmobius.gameserver.enums.CategoryType;
 import com.l2jmobius.gameserver.enums.Race;
 import com.l2jmobius.gameserver.enums.TrapAction;
@@ -2589,6 +2590,13 @@ public class Quest extends AbstractScript implements IIdentifiable
 	 */
 	public void registerQuestItems(int... items)
 	{
+		for (int id : items)
+		{
+			if ((id != 0) && (ItemTable.getInstance().getTemplate(id) == null))
+			{
+				_log.severe(super.getClass().getSimpleName() + ": Found registerQuestItems for non existing item: " + id + "!");
+			}
+		}
 		questItemIds = items;
 	}