Cursed Backpack

[KatlynnEst]

Having multiple mods is so frustrating, and now one of my players in my server had put something in their backpack that has caused the backpack to become cursed, anytime a player picks it up, they are immediately kicked, giving the horrible error below:

Internal Exception: io.netty.handler.codec.DecoderException: java.lang.IllegalArgumentException: Payload may not be larger than 32767 bytes

My immediate thought is that my modpack or datapack does not like the backpack mod ID.

We have contained the thing, and I simply just want to get the items out of the backpack without destroying it or my game.