Orphans prevent purge

When trying to do a purge I receive a message “Unable to start the purge process as there are 29 orphan file(s)”. I have read a lot of (mostly old) topics on cleanups, but the old command is not available in version 2.0.4.5 and the solution to run a backup with --auto-cleanup=true does not change a think.

Any help would be appreciated!