java.lang.NullPointerException
        at net.sf.l2j.gameserver.model.L2Attackable.addDamageHate(L2Attackable.java:806)
        at net.sf.l2j.gameserver.model.actor.instance.L2MonsterInstance.addDamageHate(L2MonsterInstance.java:253)
        at net.sf.l2j.gameserver.ai.L2AttackableAI.onEvtAttacked(L2AttackableAI.java:771)
        at net.sf.l2j.gameserver.ai.AbstractAI.notifyEvent(AbstractAI.java:375)
        at net.sf.l2j.gameserver.ai.AbstractAI.notifyEvent(AbstractAI.java:346)
        at net.sf.l2j.gameserver.model.L2Character.onHitTimer(L2Character.java:4234)
        at net.sf.l2j.gameserver.model.actor.instance.L2PcInstance.onHitTimer(L2PcInstance.java:3187)
        at net.sf.l2j.gameserver.model.L2Character$HitTask.run(L2Character.java:1654)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:207)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)