What can be done for errors like this? Rebuild-index and prune don’t seem to be cutting it… 
tree 786a54f4: file “2020-07-13 10.23.06.jpg” blob 2 size could not be found
tree 786a54f4: file “2020-07-13 10.23.06.jpg” blob 3 size could not be found
tree 786a54f4: file “2020-07-13 19.08.24.jpg” blob 0 size could not be found
tree 786a54f4: file “2020-07-13 19.08.24.jpg” blob 1 size could not be found
tree 786a54f4, blob dce4b0d9: not found in index
tree 786a54f4, blob f870a0d3: not found in index
tree 786a54f4, blob b8591f64: not found in index
tree 786a54f4, blob a5a9c2a3: not found in index
EDIT: Ran a rebuild-index. Running a fresh snapshot of my Mac and Drobo now. Unfortunately my grandpa’s computer that had been backing up to my repo has bit the dust. Hoping the damage isn’t in his part of the repository. Going to try the advice here after that. I’ll report back. I think I’ll be cloning the repo on pCloud from now on, and running prune on the clone followed by a check before replacing the original repo from now on…