[Tekki server crash EE]

My server crash for the errors

[20:23:11] java.util.ConcurrentModificationException

[20:23:11] at java.util.ArrayList$Itr.checkForComodification(Unknown Source)

[20:23:11] at java.util.ArrayList$Itr.next(Unknown Source)

[20:23:11] at net.minecraft.server.mod_EE.onTickInGame(mod_EE.java:157)

[20:23:11] at net.minecraft.server.mod_EE.onTickInGame(mod_EE.java:105)

[20:23:11] at net.minecraft.server.BaseMod.doTickInGame(BaseMod.java:34)

[20:23:11] at cpw.mods.fml.common.modloader.BaseModTicker.sendTick(BaseModTicker.java:95)

[20:23:11] at cpw.mods.fml.common.modloader.BaseModTicker.tickBaseMod(BaseModTicker.java:83)

[20:23:11] at cpw.mods.fml.common.modloader.BaseModTicker.tickEnd(BaseModTicker.java:55)

[20:23:11] at cpw.mods.fml.common.SingleIntervalHandler.tickEnd(SingleIntervalHandler.java:22)

[20:23:11] at cpw.mods.fml.common.FMLCommonHandler.tickEnd(FMLCommonHandler.java:185)

[20:23:11] at cpw.mods.fml.server.FMLBukkitHandler.onServerPostTick(FMLBukkitHandler.java:631)

[20:23:11] at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:607)

[20:23:11] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

[20:23:11] at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

[20:23:11] Unexpected exception

FIX?