I’ve ripped a few CD’s recently - not entirely successfully as the metadata is missing on some. Is the only solution to rip using another tool and import to my library?
I can presumably delete the folder that ROCK ripped to to avoid duplication?
Yes, you can, but not easily identifiable. Why don’t you use the Roon UI to delete the release? This will remove the files, too.
Either way, imho, it is a good idea to go to Library and clean it out to remove the database entries of the deleted files before re-importing them.