Description of the Bug

Every time I login the game,it crashed.But it was strange that the crash didn't happen when I login another one.
I could only delete Morph and MorphSpellPack if I want to play normally.
Plz forgive me that i ask my issue on github.Discord Judged me as a robot:(
crash-2023-01-19_16.06.07-server.txt
crash-2023-01-19_16.06.07-server.txt

Expected Behaviour

Login the game normally without deleting mods.

Modpack Version

1.6.1

Screenshots

No response

Log

No response

Extra Info

Extra Mods: I18nUpdateMod-3.2.0-all;jecharacters-1.12.0-3.6.3.

You have bad morph data it seems, using NBT editing will help you resolve this in a more proper manner.
Use https://irath96.github.io/webNBT/ to do the NBT editing.
i don't think i can really do much to prevent this from happening entirely, but if it's triggered by morphing to specific entities, i probably can.

In your playerdata tag/file, navigate to ForgeData > PlayerPersisted, and try deleting the MorphSave tag.