I edited an option set to include an extra option, "Camping". I then downloaded an advanced find including that option set field, because I wanted to update a few hundred records at once. When I went to import the changes, I get an error message saying a different option in the set, "Play and Recreation" cannot be mapped. I have no idea how or why, because it wasn't the field I changed, and I'm importing straight from an advanced find, so the option is definitely there. What could be the cause of the issue?