Pomoc

Ovo mi stalno dolazi na konzolu!!! Server se ne crasha samo mi se to pojavljuje

Caused by: java.lang.NullPointerException
2014-07-14 14:22:44 [SEVERE] Could not pass event EntityDamageByEntityEvent to Factions v2.3.1
org.bukkit.event.EventException
   at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:294)
   at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
   at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:30)
   at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502)
   at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487)
   at org.bukkit.craftbukkit.v1_7_R2.event.CraftEventFactory.callEvent(CraftEventFactory.java:99)
   at org.bukkit.craftbukkit.v1_7_R2.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:403)
   at org.bukkit.craftbukkit.v1_7_R2.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:430)
   at net.minecraft.server.v1_7_R2.EntityLiving.damageEntity(EntityLiving.java:663)
   at net.minecraft.server.v1_7_R2.EntityHuman.damageEntity(EntityHuman.java:751)
   at net.minecraft.server.v1_7_R2.EntityPlayer.damageEntity(EntityPlayer.java:467)
   at net.minecraft.server.v1_7_R2.EntityHuman.attack(EntityHuman.java:923)
   at net.minecraft.server.v1_7_R2.PlayerConnection.a(PlayerConnection.java:1144)
   at net.minecraft.server.v1_7_R2.PacketPlayInUseEntity.a(SourceFile:55)
   at net.minecraft.server.v1_7_R2.PacketPlayInUseEntity.handle(SourceFile:10)
   at net.minecraft.server.v1_7_R2.NetworkManager.a(NetworkManager.java:148)
   at net.minecraft.server.v1_7_R2.ServerConnection.c(ServerConnection.java:77)
   at net.minecraft.server.v1_7_R2.MinecraftServer.v(MinecraftServer.java:703)
   at net.minecraft.server.v1_7_R2.DedicatedServer.v(DedicatedServer.java:273)
   at net.minecraft.server.v1_7_R2.MinecraftServer.u(MinecraftServer.java:566)
   at net.minecraft.server.v1_7_R2.MinecraftServer.run(MinecraftServer.java:472)
   at net.minecraft.server.v1_7_R2.ThreadServerApplication.run(SourceFile:618)
Caused by: java.lang.NullPointerException