Dark Fury45

I'd be lying if I said I knew where to begin looking for the answer to this problem. Anyone able to help? It only does this on a world I've been playing on, and I'm not sure why. Making a new world doesn't cause issues, trying to play the same world again causes the crash. ---- Minecraft Crash Report ---- // Don't be sad. I'll do better next time, I promise! Time: 23/01/16 4:48 PM Description: Exception in server tick loop java.lang.IllegalArgumentException: Invalid UUID string: 240a5facef7544f5be9f2c26028037e7 at java.util.UUID.fromString(UUID.java:194) at latmod.core.mod.LMDataLoader.readPlayersFromNBT(LMDataLoader.java:44) at latmod.core.mod.LCEventHandler.worldLoaded(LCEventHandler.java:93) at cpw.mods.fml.common.eventhandler.ASMEventHandler_4_LCEventHandler_worldLoaded_Load.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.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:73) at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:92) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387) at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)