Почему майнкрафт крашиться?

хорошо эту проблему я исправил но теперь возникла другая устанавливаю моды а мне пишет вот это: ----Minecraft Crash Report ----
// Oops.

Time: 25.12.16 13:41
Description: Ticking memory connection

java.lang.IllegalArgumentException: Duplicate id value for 20!
at net.minecraft.entity.DataWatcher.func_75682_a(SourceFile:64)
at com.gibby.dungeon.DungeonsExtendedPlayer.(DungeonsExtendedPlayer.java:41)
at com.gibby.dungeon.DungeonsExtendedPlayer.register(DungeonsExtendedPlayer.java:50)
at com.gibby.dungeon.DungeonEventHandler.onEntityConstructing(DungeonEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_133_DungeonEventHandler_onEntityConstructing_EntityConstructing.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at net.minecraft.entity.Entity.(Entity.java:179)
at net.minecraft.entity.EntityLivingBase.(EntityLivingBase.java:119)
at net.minecraft.entity.player.EntityPlayer.(EntityPlayer.java:141)
at net.minecraft.entity.player.EntityPlayerMP.(EntityPlayerMP.java:138)
at net.minecraft.server.management.ServerConfigurationManager.func_148545_a(ServerConfigurationManager.java:410)
at net.minecraft.server.network.NetHandlerLoginServer.func_147326_c(NetHandlerLoginServer.java:101)
at net.minecraft.server.network.NetHandlerLoginServer.func_147233_a(NetHandlerLoginServer.java:60)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:215)
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at