Initial Questions

• I have searched this issue tracker and there is nothing similar already, and this is not on the list of known issues. Posting on a closed issue saying the bug still exists will prompt us to investigate and reopen it once we confirm your report.
• I have verified that this issue occurs in a SUPPORTED environment, meaning I can reproduce this WITHOUT OptiFine, and without Bukkit+Forge server software like KCauldron, Thermos, Crucible, Mohist etc

Mod Version

Et_Futurum_Requiem-2.5.1

Describe the Issue

Installed with Botania, and enableDeepslateOres=false.
Create a new world.
Deepslate Ores will replace for block with ID 255, and the botania block will occupy this ID.

↑ Screenshot taken from an environment where only EFR and Botania are installed

In addition, the situation of Thaumcraft is compared, Thaumcraft does not occupy ID255, but only copper ore spawn.

Conflicting Mods

Botania r1.8-249

Crash Report

No response

Other Details

No response

Duplicate of #341
Unofficial 2.5.2 build is provided by TechnoParadox if you need a fix now