Duplicate files · Duplicates in cloud accounts
What does it mean when a cloud account "doesn't publish file fingerprints"?
Short answer: The service doesn't provide content fingerprints, so its files can't be compared without downloading every one — which Storage Studio won't do. It means "we couldn't look", not "no duplicates"; your files there are untouched.
It means the service doesn't provide content fingerprints for its files, so there's no way to tell identical files apart without downloading every one of them — which Storage Studio won't do. The message reads "… doesn't publish file fingerprints, so we can't compare files there without downloading them — which we won't do."
It's an honest "we couldn't look", not "there are no duplicates". Your files in that account are untouched. Other accounts, and your Mac, are checked normally.