Create Dupe Patch
I don't know my version or loader
Create Dupe Patch
A lightweight, server-side fix for the Create mod duplication exploit that allows Schematicannons to duplicate items with NBT data (such as placards, framed blocks, and other items with inventory/data).
What it does:
- Patches Create issue #9511 where Schematicannons could print items with full NBT while only consuming the base block
- Ensures the material checklist correctly accounts for items inside block entities
- Prevents item duplication through schematic printing
Key Features:
- ✅ Server-side only - No client installation required
- ✅ Backport for 1.20.1 - Brings the 1.21 fix to 1.20.1 modpacks
- ✅ Lightweight - Single mixin, minimal performance impact
- ✅ Compatible - Works with existing Create installations without breaking functionality
Why this matters:
The vanilla Create mod in 1.20.1 has a critical bug where schematics containing blocks with items (placards, storage blocks, etc.) can be printed while only consuming the empty block, effectively duplicating valuable items. This exploit was fixed upstream in Create 6.0.9+ for 1.21, but this patch brings that fix to 1.20.1 servers.
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.1, 1.20.1
- 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 CurseForge — 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.
- Ships as createdupepatch-1.0.jar — drop this file into the mods folder
- Download size: 5 KB
- Download link checked 18 Sept 2026 — working
These come from our own check of the pack file, not from the source page.