Explanation:

• I have changed gems, affixes and rarities;
• Individually, none of the changed bonuses or numbers cause any issues, as I have tested them individually many many times;
• Mobs wearing Apotheosis gear is disabled in the DataPack;
• When walking around, apotheosis will randomly cause a crash (assumed it is when trying to generate loot with affixes).

Crash logs:

• crash-2024-10-27_03.50.12-server.txt
• crash-2024-10-27_03.55.31-server.txt

There are absolutely no issues when not using the datapack and I have played for hours without it
This is a custom modpack

DataPack:

• apoth.zip

(I don't know how useful this might be)

You've replaced the festive affix with an affix of a different type (executing), even though you've kept the same name. Thus, the crash. Don't do that.

Lmao sorry XD
That was very dumb from me :3

It's better to remove affixes you don't like and then create new ones in another namespace other than the Apotheosis one instead of replacing ones