DEUF Refabricated
Fixes entities duplicated UUIDs, removing log spam and preventing crashes.
About this Mod
DEUF Refabricated is a fabric port of the mod DEUF (Duplicated Entity UUID Fixer) by CAS-ual-TY. It fixes duped UUIDs, removing log spam and also fixing some crashes.
This mod only needs to be present on the server to work. But it's recommended to be included in modpacks to fix these issues while on singleplayer.
The entities will only be fixed on spawn, which means that if your world already has duplicated entities, this will not fix it, you'll have to remove them. Future entities that spawn while this mod is installed will not be duplicated.
Available Versions
How to Install DEUF Refabricated on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.3).
Install Mod
Open the mod browser in the dashboard and search for "DEUF Refabricated". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.3, 1.21.2, 1.21.1 (+12 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
DEUF Refabricated server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.3). You can switch loaders with one click in the panel.
Is DEUF Refabricated compatible with fabric?
DEUF Refabricated officially supports fabric for Minecraft 1.21.3, 1.21.2, 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with DEUF Refabricated – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if DEUF Refabricated consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Rent Modded Server
Install DEUF Refabricated with just one click on your server.