Observed behaviour

When I put two similar items (Lets say a blackstone hammer and another blackstone hammer) in a Grindstone it crashes my game.

Expected behaviour

Putting 2 similar items in a grindstone doesn't crash the game and just doesn't show a result-

Steps to reproduce

1. Craft 2 similar items. (For example 2 blackstone hammers with the same binding, handle and material)
2. Have it enchanted (Don't know if that is needed, but it was in my case)
3. Put one in a grindstone and then the other tool/weapon or whatever you are using.
4. CRASH with exit code -1

Crashlog

https://gist.github.com/Maxi90909/3fa717602f6ec25b1349696491d040b9

Tetra version

tetra-1.20.1-6.3.0.jar

mutil/mGui version

mutil-1.20.1-6.1.1.jar

Forge version

1.20.1-47.3.1

Other mods

Didn't fit in here (maximum Characters reached) So I used pastebin: https://pastebin.com/3zcQRvHA