I used server-side encryption for quite a while now but decided to disable this feature. I executed occ encryption:decrypt-all to disable the feature and decrypt my files. After a while I received a message that some files could not be decrypted for two of my three users.
As the amount of data is not too much I decided to simply delete all files from nextcloud and upload them again. So far, so good.
After deleting my files I checked my data directory which is now empty except for the ‘/files_encryption’ folder. Here I found a ton of orphaned encryption keys belonging to files which are not part of the system anymore.
How can I get rid of these files? I tried things like occ files:cleanup and occ files:scan --all but this had no effect.