GitHub Maven Packages returns 422 error code for Scala 3 artifacts

Hi ~

I have an example package here: GitHub - er1c/github-packages-tests

It works fine for Scala 2.10, 2.11, 2.12, and 2.13. However, when trying to publish an artifact based upon 3.0.0-RC1 I get an error:

[error] stack trace is suppressed; run last publish for the full output
[error] (publish) java.io.IOException: Server returned HTTP response code: 422 for URL: https://maven.pkg.github.com/er1c/github-packages-tests/com/example/cross-scala-example_3.0.0-RC2/0.1.0/cross-scala-example_3.0.0-RC2-0.1.0.pom
[error] Total time: 3 s, completed Apr 4, 2021 9:24:25 PM

These milestone and release candidates add the binary compatibility version as part of the artifact (e.g. https://mvnrepository.com/artifact/org.typelevel/paiges-core_3.0.0-M3/0.4.0)

This doesn’t look to be compatible for some reason with GitHub Packages?

Any advise would be appreciated.

Thanks,

Eric