Describe the bug
Compatibility issue with Puzzle Lib - Anvil upgrade crashes
Crash log if it's a crash.

crash-2025-01-22_09.34.06-client.txt

latest.log

Info on what other mods you're using that may cause a conflict here if applicable.
PuzzlesLib-v21.1.27-1.21.1-Fabric

To Reproduce

Steps to reproduce the behavior:

1. Fabric 1.21.1 - Sophisticated Backpacks [Fabric], and puzzle lib + decencies for both
2. Use anvil upgrade to rename or merge
3. Crash

Expected behavior
Anvil to work like an anvil and not crash

Screenshots
N/A

Versions
fabric-api-0.115.0+1.21.1.jar
ForgeConfigAPIPort-v21.1.3-1.21.1-Fabric.jar
PuzzlesLib-v21.1.27-1.21.1-Fabric.jar
sophisticatedbackpacks-1.21.1-3.21.1.1.82.jar
sophisticatedcore-1.21.1-1.0.13.1.120.jar

New versions have been released, this should now be fixed.