Store replaced skills and skip learning them.

Thanks to marciox25.

L2J_Mobius_10.1_MasterClass/java/org/l2jmobius/gameserver/data/xml/SkillTreeData.java

@@ -718,6 +718,11 @@ public class SkillTreeData implements IXmlReader
 				continue;
 			}
 			
+			if (player.hasReplacedSkill(skill.getSkillId()))
+			{
+				continue;
+			}
+			
 			if (player.getLevel() >= skill.getGetLevel())
 			{
 				if (skill.getSkillLevel() > SkillData.getInstance().getMaxLevel(skill.getSkillId()))
@@ -1521,6 +1526,11 @@ public class SkillTreeData implements IXmlReader
 					continue;
 				}
 				
+				if (player.hasReplacedSkill(skill.getSkillId()))
+				{
+					continue;
+				}
+				
 				if (minLevelForNewSkill <= skill.getGetLevel())
 				{
 					final Skill oldSkill = player.getKnownSkill(skill.getSkillId());

L2J_Mobius_10.1_MasterClass/java/org/l2jmobius/gameserver/model/actor/Player.java

@@ -838,6 +838,7 @@ public class Player extends Playable
 	
 	/** Map containing all custom skills of this player. */
 	private Map<Integer, Skill> _customSkills = null;
+	public final Set<Integer> _replacedSkills = ConcurrentHashMap.newKeySet(1);
 	
 	private volatile int _actionMask;
 	
@@ -13485,6 +13486,21 @@ public class Player extends Playable
 		}
 	}
 	
+	public void addReplacedSkill(int skillId)
+	{
+		_replacedSkills.add(skillId);
+	}
+	
+	public void removeReplacedSkill(int skillId)
+	{
+		_replacedSkills.remove(skillId);
+	}
+	
+	public boolean hasReplacedSkill(int skillId)
+	{
+		return _replacedSkills.contains(skillId);
+	}
+	
 	/**
 	 * @return {@code true} if current player can revive and shows 'To Village' button upon death, {@code false} otherwise.
 	 */