warningMod ErrorsAffects: All versions
How to Fix Duplicate Mod Error
Fix Duplicate Mod Error by removing extra copies and keeping only the latest version of each mod.
Quick Fix
Remove the duplicate. Keep only the latest compatible version of each mod.
Error Message
Duplicate mod: X / Found duplicate mod at pathHow to Fix
1
Check the mods folder for files with similar names
2
Remove older versions, keeping only the latest
3
If jar-in-jar, check the mod's page for instructions
4
Sort mods alphabetically to spot duplicates easily
Common Causes
- Two copies of the same mod in the mods folder
- Different versions of the same mod installed
- Mod bundled inside another mod (jar-in-jar)
Diagnostic Steps
- List all files in the mods folder
- Find duplicates (same mod name, different version numbers)
- Delete the older version
- Restart
FAQ
What is jar-in-jar?
Some mods bundle their dependencies inside their jar file. This can cause duplicate errors if you also have the dependency installed separately.