Exception in thread "General Pool-13" java.lang.ClassCastException: net.sf.l2j.g
ameserver.model.actor.instance.L2MonsterInstance cannot be cast to net.sf.l2j.ga
meserver.model.actor.instance.L2PcInstance
        at net.sf.l2j.gameserver.model.L2Character.doAttack(L2Character.java:423
)
        at net.sf.l2j.gameserver.model.L2Character$AIAccessor.doAttack(L2Charact
er.java:2757)
        at net.sf.l2j.gameserver.model.actor.instance.L2PcInstance$AIAccessor.do
Attack(L2PcInstance.java:256)
        at net.sf.l2j.gameserver.ai.L2PlayerAI.thinkAttack(L2PlayerAI.java:191)
        at net.sf.l2j.gameserver.ai.L2PlayerAI.onEvtThink(L2PlayerAI.java:267)
        at net.sf.l2j.gameserver.ai.L2CharacterAI.onEvtArrived(L2CharacterAI.jav
a:646)
        at net.sf.l2j.gameserver.ai.AbstractAI.notifyEvent(AbstractAI.java:402)
        at net.sf.l2j.gameserver.ai.AbstractAI.notifyEvent(AbstractAI.java:331)
        at net.sf.l2j.gameserver.GameTimeController$MovingObjectArrived.run(Game
TimeController.java:238)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExec
utor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:907)
        at java.lang.Thread.run(Thread.java:619)