Invalid item crash

[VenoPhage]

Description

When a mon in a party somehow gets an invalid item (my case a tiny mushroom) the server will crash when catching any wild pokemon

How to reproduce

Steps to reproduce the behavior:

1. download my .pk player data
2. rename so uuid matches testing player uuid
3. have edited .pk in save/world/playerdata/pokemon/
4. Load world with edited .pk and catch any mon (I used a quick ball and ultra ball to test but any ball probably works)
5. you crash, crash can be resolved by clicking the invalid item or removing the mon with the item from the party

Context

Pixelmon Version: 9.3.16
PixelTweaks Version: 3.0.8
Server or Single Player: Both have same result

Additional Context:
Im not sure how exactly my mon was holding this item in the first place

[VenoPhage]

reporting here and not pixelmon because the crash only occurred when tweaks was installed