The update log of 7.30.0 says: Code (Text): 1.12.2 support WARNING! Installing this version on a v8 generated world will create irreparable damage to your server. Not tested enough, released due to high demand. Backup before installing Version 7.2.30, support for 1.12.2, might be unstable. Needs more testing. Removed biome IDs, could potentially create some issues. Require new version of EpicNetherGenerator (1.0.6 , v7 edition) That it might be unstable? Do you use this version with 1.12.2? Does it work without problems, Errors?