Failed executing MagicUseTask.
java.lang.ClassCastException: net.sf.l2j.gameserver.model.actor.instance.L2Grand
BossInstance cannot be cast to net.sf.l2j.gameserver.model.actor.instance.L2PcIn
stance
        at net.sf.l2j.gameserver.model.actor.L2Character.onMagicHitTimer(L2Chara
cter.java:6273)
        at net.sf.l2j.gameserver.model.actor.L2Character$MagicUseTask.run(L2Char
acter.java:2667)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.
access$301(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.
run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)