DEUF 9minecraft Mod fixes broken entity identifiers when loading Minecraft worlds. Copied saves, restored backups, and edited world files can cause duplicate ID errors that spam server logs or stop a world from loading. This mod catches matching IDs right away and gives new entities a fresh identifier. Both mobs stay safe in your world, and your save loads without errors.
Features:
- Automatically detects duplicate entity identifiers before they cause save errors.
- Assigns a brand new unique ID to duplicate mobs, items, and vehicles.
- Prevents server console spam from repeated duplicate ID warnings.
- Keeps both entities in your world instead of rejecting or deleting one.
- Runs quietly in the background without adding extra items, blocks, or menus.
- Offers an optional config setting to log each repaired entity in the console.
Screenshots:
DEUF 9minecraft Mod Download Links
Quick facts
- Edition: Minecraft Java
- File type: .jar
- 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 the file's original source — 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.
DEUF 9minecraft Mod (26.2) – Protect Your World Saves From Duplicate Mob IDs is a free Minecraft Java mod. Download it and open it directly in the game.