Subclass Skills stacking

[Mradvanced]

Subclass Skills are Stacking When Changing Subclass at the Priest.
ive Tried Changing some code in l2pcinstance.java file. but nothing seems to be working.
im getting many errors in console:

Error could not store char skills: Duplicate entry '269044525-842-0' for key 'PR
IMARY'
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Dupl
icate entry '269044525-842-0' for key 'PRIMARY'
        at sun.reflect.GeneratedConstructorAccessor102.newInstance(Unknown Sourc
e)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
        at com.mysql.jdbc.Util.getInstance(Util.java:386)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1039)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2624)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.ja
va:2127)
        at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1362)

        at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.execute(NewProxyPr
eparedStatement.java:989)
        at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.storeSkill
(L2PcInstance.java:8345)
        at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.addSkill(L
2PcInstance.java:8230)
        at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.giveAvaila
bleSkills(L2PcInstance.java:2937)
        at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.rewardSkil
ls(L2PcInstance.java:2849)
        at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.setClassId
(L2PcInstance.java:2663)
        at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.restore(L2
PcInstance.java:7518)
        at com.l2jserver.gameserver.model.actor.instance.L2PcInstance.load(L2PcI
nstance.java:1249)
        at com.l2jserver.gameserver.network.L2GameClient.loadCharFromDisk(L2Game
Client.java:587)
        at com.l2jserver.gameserver.network.clientpackets.CharacterSelect.runImp
l(CharacterSelect.java:115)
        at com.l2jserver.gameserver.network.clientpackets.L2GameClientPacket.run
(L2GameClientPacket.java:62)
        at com.l2jserver.gameserver.network.L2GameClient.run(L2GameClient.java:1
095)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

Its Really Bugging me and it Needs to be fixed. Any Solution?

[anonymous]

Would anyone be able to help please?