Board Thread:Bug Reports/@comment-26358197-20150501131640/@comment-27219153-20160812012347

If you look at this part of the crash report:

-- Entity being ticked -- Details: Entity Type: lotr.GaladhrimTrader (lotr.common.entity.npc.LOTREntityElvenTrader) Entity ID: 4121448 Entity Name: Elu, the Galadhrim Wanderer Entity's Exact location: 15.77, 79.00, -39.12 Entity's Block location: World: (15,79,-40), Chunk: (at 15,4,8 in 0,-3; contains blocks 0,0,-48 to 15,255,-33), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1) Entity's Momentum: 0.00, -0.08, 0.00 Stacktrace: at net.minecraft.world.World.func_72939_s(World.java:1887) at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489)

The part that I've bolded will tell you which file to delete. I'm not sure if it will keep happening, I'm kinda surprised that it happened twice.