The issue is that you created boot-source-selections for os/release multiple times, and the UI is failing to handle this. Overall your boot-source-selections are in an inconsistent state. You need to merge all boot-source-selections for os/release into one selection.
Use the API to remove all extra selections on that boot source or the given os/release combination. Make only one os/release combination per selection.
If you need multiple architectures then you can just do 'arches="amd64" arches="arm64"' in the same create command.
The issue is that you created boot-source- selections for os/release multiple times, and the UI is failing to handle this. Overall your boot-source- selections are in an inconsistent state. You need to merge all boot-source- selections for os/release into one selection.
Use the API to remove all extra selections on that boot source or the given os/release combination. Make only one os/release combination per selection.
If you need multiple architectures then you can just do 'arches="amd64" arches="arm64"' in the same create command.