Delete extra uploaded media files

Server Version#: 1.42.1.10060

I clicked ‘Edit’ on an audio file and went under background and ‘choose an image’ to select my own image to upload. I went to click the image and upload but I accidentally selected multiple images and clicked upload. Is there a way to delete the extra images - when selecting the image there isn’t any delete button/link that I can see. Maybe even ssh’ing to the qnap directly and knowing what the full path to that media is and then i’d see the extra images.

Only Plex Dance’ing the whole album.