java.lang.NullPointerException
	at javolution.util.FastList$Node.access$200(Unknown Source)
	at javolution.util.FastList.valueOf(Unknown Source)
	at javolution.util.FastCollection.remove(Unknown Source)
	at ru.catssoftware.gameserver.instancemanager.DuelManager.removeDuel(DuelManager.java:127)
	at ru.catssoftware.gameserver.model.entity.Duel.endDuel(Duel.java:881)
	at ru.catssoftware.gameserver.model.entity.Duel$ScheduleEndDuelTask.run(Duel.java:343)
	at ru.catssoftware.gameserver.ThreadPoolManager$RunnableWrapper.run(ThreadPoolManager.java:303)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)