NPC 12145 class not found
java.lang.ClassCastException: net.sf.l2j.gameserver.ai.L2SiegeGuardAI
        at net.sf.l2j.gameserver.model.L2Attackable.OnSpawn(L2Attackable.java:16
08)
        at net.sf.l2j.gameserver.model.L2Spawn.intializeNpcInstance(L2Spawn.java
:476)
        at net.sf.l2j.gameserver.model.L2Spawn.doSpawn(L2Spawn.java:411)
        at net.sf.l2j.gameserver.model.L2Spawn.init(L2Spawn.java:333)
        at net.sf.l2j.gameserver.instancemanager.SiegeGuardManager.spawnSiegeGua
rd(SiegeGuardManager.java:127)
        at net.sf.l2j.gameserver.model.entity.Siege.spawnSiegeGuard(Siege.java:1
125)
        at net.sf.l2j.gameserver.model.entity.Siege.startSiege(Siege.java:351)
        at net.sf.l2j.gameserver.handler.admincommandhandlers.AdminSiege.useAdmi
nCommand(AdminSiege.java:187)
        at net.sf.l2j.gameserver.clientpackets.RequestBypassToServer.runImpl(Req
uestBypassToServer.java:80)
        at net.sf.l2j.gameserver.clientpackets.ClientBasePacket.run(ClientBasePa
cket.java:59)
        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)