What happened?

The latest version of Promenade for 1.20 - 1.20.2 bundles a version of Biolith which causes TerraBlender's deferred_placeholder biome to generate in the world when used with another biome mod which uses the deferred placeholder feature. This is resolved in Biolith 1.0.0-beta.1 for 1.20 - 1.20.1 and in Biolith 1.1.0-beta.1 for 1.20.2, so re-releasing Promenade with an updated version of Biolith would resolve the issue.

In the meantime, users can also just add the updated Biolith to their mods: https://modrinth.com/mod/biolith/version/1.0.0-beta.1

In practice this is probably fairly rare still, since (I think) it basically requires running Promenade with BYG and not running any of the Terraformers biome mods, which were released with the updated Biolith bundled back in December.

Dawn API version

unknown

Fabric API version

any

Relevant log output

No response