delete files

When I try to delete the backup files, they are deleted from dropbox (where they are stored) but there are still files visible in wordpress that I can’t delete completely. When I do so, it shows 0 files deleted but they remain visible (see screenshot https://prnt.sc/Xwn7WIWDwUUq and https://prnt.sc/ykaYCTDKsY7b)

Thank you