Achievement related crash

[minyman60]

Minecraft version: 1.6.4
Forge version: 9.11.1.921
Crossbow mod 2 version: a0.1.6

java.lang.RuntimeException: Duplicate stat id: "Unknown stat" and "achievement.CreateBench" at id 5243864

at net.minecraft.stats.StatBase.func_75971_g(SourceFile:32)

at net.minecraft.stats.Achievement.func_75985_c(SourceFile:51)

at micdoodle8.mods.crossbowmod.CrossbowModCore.load(CrossbowModCore.java:105)

The player file got corrupted by picking up an untitled achievement, Removing the mod from the mods folder let them log in again...

Further removing, Loading Minecraft then replacing the mod worked, however my crossbow crafting table (which I believe granted me the null achievement) has disappeared with removing the mod, I'll have to summon one in as a work around as to not be awarded with a null achievement again.

I'm unsure how the mod works, But know a bit about Java, is this an exception not being caught? Possibly the achievement value needs validating?

[hedgehog1029]

I got this. A way to fix is to delete the stat folder (or rename it). You can find a full log of my crash here: http://pastebin.com/zpdbLneJ

[minyman60]

Sounds like a simple fix, Too bad its 7 months later ;D