Maintenance errors: error verifying [...] content not found

Hello everyone,

I am currently experiencing errors during a maintenance run:

ERROR error processing PATH/TO/FILE/....: error verifying Ix15bade00c57823b7d125ee5290ff7b7d: error getting content info for d3be9795812b3adac0f18d1e89f35d53: content not found
ERROR error processing PATH/TO/FILE/....: error verifying Ix97ccd3dc4ea49e8ef7c90dac5f25cf9e: error getting content info for 776718c6af2af934ef7c63ca6c5c517d: content not found
ERROR error processing PATH/TO/FILE/....: error verifying Ixc060bde24a012f568fff6c50df15b90f: error getting content info for af3e35c18e492d7dfb25611edc7cf439: content not found
ERROR error processing PATH/TO/FILE/....: error verifying Ix0f2b23e41ba2b3ddfc42b604864b1319: error getting content info for 1eaba0c6818cbb7056a9819894e2127d: content not foundFinished full maintenance.
ERROR snapshot GC failure: error running snapshot gc: unable to find in-use content ID: error processing snapshot root: encountered 57 errors

Backup still works. I performed maintenance on another machine while my backup machine was turned off.
How do I fix/remove these errors?

Any help is appreciated!

Kopia version: 0.15.0 build: dd1ebb11cfdb7902a2b87106dfeea038858bafb5 from: kopia/kopia

Same situation here, a lot of my repos start showing these errors during maintenance after upgrading to 0.15.

The fix invalid-files command scaringly also finds and removes invalid entries, but maintenance doesn’t succeed regardless.

Any suggestions would be highly appreciated, since I fear my backups are not reliable anymore and simply reuploading is not an option due to the amount of data and data consumption during upload.