This is a fix of a known bug in Create 1.21.1 (Create#9695) where items with NBT changing constantly (e.g. Relics Mod, pocket generators...) get desynced in the inventory and cause client to disconnect from IndexOutOfBoundsException if the item is in the last slot of player's hotbar.
This project was vibe coded, it's only published to be used in my modpack.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.1, 1.21.2, 1.21.3
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as stockkeepercrashguard-1.0.0.jar — drop this file into the mods folder
- Download size: 5 KB
- Download link checked 6 Sept 2026 — working
These come from our own check of the pack file, not from the source page.