NPC 31093 class not found
java.lang.NullPointerException
        at javolution.util.FastList$Node.access$300(Unknown Source)
        at javolution.util.FastList.valueOf(Unknown Source)
        at javolution.util.FastCollection.contains(Unknown Source)
        at net.sf.l2j.gameserver.model.zone.L2ZoneType.revalidateInZone(L2ZoneTy
pe.java:259)
        at net.sf.l2j.gameserver.model.zone.L2ZoneManager.revalidateZones(L2Zone
Manager.java:66)
        at net.sf.l2j.gameserver.model.L2WorldRegion.revalidateZones(L2WorldRegi
on.java:92)
        at net.sf.l2j.gameserver.model.L2Character.revalidateZone(L2Character.ja
va:3625)
        at net.sf.l2j.gameserver.model.L2Character.onSpawn(L2Character.java:282)

        at net.sf.l2j.gameserver.model.actor.instance.L2NpcInstance.onSpawn(L2Np
cInstance.java:2195)
        at net.sf.l2j.gameserver.model.L2Object.spawnMe(L2Object.java:294)
        at net.sf.l2j.gameserver.model.L2Spawn.intializeNpcInstance(L2Spawn.java
:511)
        at net.sf.l2j.gameserver.model.L2Spawn.doSpawn(L2Spawn.java:444)
        at net.sf.l2j.gameserver.model.AutoSpawnHandler$AutoSpawner.run(AutoSpaw
nHandler.java:528)
        at java.util.concurrent.Executors$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)

NPC 31093 class not found
java.lang.NullPointerException
        at javolution.util.FastList$Node.access$300(Unknown Source)
        at javolution.util.FastList.valueOf(Unknown Source)
        at javolution.util.FastCollection.contains(Unknown Source)
        at net.sf.l2j.gameserver.model.zone.L2ZoneType.revalidateInZone(L2ZoneTy
pe.java:259)
        at net.sf.l2j.gameserver.model.zone.L2ZoneManager.revalidateZones(L2Zone
Manager.java:66)
        at net.sf.l2j.gameserver.model.L2WorldRegion.revalidateZones(L2WorldRegi
on.java:92)
        at net.sf.l2j.gameserver.model.L2Character.revalidateZone(L2Character.ja
va:3625)
        at net.sf.l2j.gameserver.model.L2Character.onSpawn(L2Character.java:282)

        at net.sf.l2j.gameserver.model.actor.instance.L2NpcInstance.onSpawn(L2Np
cInstance.java:2195)
        at net.sf.l2j.gameserver.model.L2Object.spawnMe(L2Object.java:294)
        at net.sf.l2j.gameserver.model.L2Spawn.intializeNpcInstance(L2Spawn.java
:511)
        at net.sf.l2j.gameserver.model.L2Spawn.doSpawn(L2Spawn.java:444)
        at net.sf.l2j.gameserver.model.AutoSpawnHandler$AutoSpawner.run(AutoSpaw
nHandler.java:528)
        at java.util.concurrent.Executors$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)