1.16.2, 1.16.3 Release Candidate 1
When you put an unknown biome in superflat it should reset but it saves and when you press done or presets it crashes.
Steps to reproduce:
- create new world
- pake it superflat
- press customize
- press presets
- type a biome that doesnt exist replacing "minecraft:plains"
- press done
- press presets or done
MC-198725 Crash when clicking "Presets" after setting the superflat preset with a non-existent biome