0. ALWAYS PROVIDE INFORMATION ABOUT MODLOADER (Fabric / Forge) AND MOD VERSION (For Example 1.19.2-8.2.10)

Version 1.21.1-10.1.6

1. Describe the bug

I can't upgrade my backpack because I can't put a leather in the forge

2. Write steps to reproduce the bug

go to the smithing table and try to put a leather

3. What is expected behaviour

4. Screenshots (If applicable)
   

so now you dont need leather to do upgrades like iron gold etc but it doesnt seem to work for crafting table upgrade

You have to apply crafting upgrade in your backpack inventory