On some of my older listings, if I try to edit them at all (add a photo or video or different tag), it is telling me my shipping profile doesn't match. It appears the sizes are listed in metric, so I'm not sure if that's the problem as it's the same shipping profile I use for all my listings that aren't POD, but it won't let me change it. Any help here, or do I just need to delete the old listing and make a new one? This is time I really would rather not waste, remaking a listing that's already there....
Would it work to make a new shipping profile and attach your listings to the new profile?
Then delete the old profile.
THIS ^^^ EXACTLY!