So that’s some kind of an iCloud bug. The file is getting duplicated. That is not ordinary. There should only be one workspace file, as far as I know.
I have no idea, but I would try deleting all of the workspace files. But I have no idea if iCloud would just restore them from the cloud.
(Before deleting any files, make sure to CLOSE Obsidian on all your devices, and COPY a backup of your vault somewhere else. Maybe preferably outside of iCloud.) It should be pretty safe to delete the workspace files. But you never do know.