warningCrash ReportsAffects: 1.18+
How to Fix Unknown Biome Error
Fix Unknown Biome Error by reinstalling the mod that provided the biomes or regenerating affected chunks.
Quick Fix
Re-install the mod that added the missing biomes, or accept that affected chunks will have default biomes.
Error Message
Unknown biome id / Biome not found in registryHow to Fix
1
Reinstall the mod that provided the missing biomes
2
If the mod is gone, affected chunks may need regeneration
3
Use MCA Selector to reset biomes in specific chunks
4
Remove invalid data packs
Common Causes
- World contains biomes from a removed mod
- Data pack adding invalid biome definitions
- World upgraded from a version with different biome IDs
Diagnostic Steps
- Read the error for the missing biome name
- Install the mod that provides it
- Or accept chunk regeneration
FAQ
Will missing biomes corrupt my world?
The world will still load, but affected areas may display as default biome (plains). No blocks will be lost.