Got this from log: [16:21:54] [main/WARN]: Unable to resolve texture due to upward reference: #tex in yabba:models/item/upgrade_base.json

I dunno, this is the first version of the mod I've tried.

Hasn't it always been there? I think its a bug I can't fix, because I'm not doing anything wrong. It doesn't break anything either, it's just a warning