Upgradable Backpack

change the item base of the GUI item of the working table to a clay ball, which means you need to change a new resource pack if you want to play this version.
If you are the old player in v9 and you don't play my other data packs, nothing will change if you upgrade to v9.1.
If you want to play my other data packs, you need to upgrade to v9.1 for the compatibility of my other data packs because they share the same resource pack.
the resource pack is at the dependencies