0. ALWAYS PROVIDE INFORMATION ABOUT MODLOADER (Fabric / Forge) AND MOD VERSION (For Example 1.19.2-8.2.10)
   Fabric / 1.21.1

1. Describe the bug
   Crash occurs on trying to put max stacked item into Backpack.
   The Items are generated on EMI (JEI) with cheat mode.
   This happened also in new game.

++ just tried more without some suspicious mod.
and i think the mod "ItemStackProMax by develk-coder" seems the reason of crash with backpack.
That mod can make the stack size more than 64. The default value is 1 million.
Without the mod is there no problem to play.

++tried other item stack size mod "9999 stack sizes by esoij" too.
and it happens same crash.

2. Write steps to reproduce the bug
   A. Open the inventory
   B. Generate max stacked items in default inventory
   C. Open the backpack
   D. Put the max stacked items into the backpack
   E. Crash occurs after few seconds

3. What is expected behaviour
   Not crashing.

4. Screenshots (If applicable)
   No Screenshots but attached the crash log.
   crash-2024-11-07_09.20.57-server.txt

5. ETC.
   Thanks for the great mod with your big efforts. This mod makes the journey in the world better.