garbage collecor

Out of curiosity, is there a way to recover a deleted PBS backup within the 24 hour grace period as noted in the official documentation before the garbage collector ran? If so, what command can be used to re-reference the 'unused chunks'? Screenshot as seen here:

Hi there, for some days the Garbage Collector operation has failed with the following error: TASK ERROR: unexpected error on datastore traversal: Not a directory (os error 20) Backups work fine. How can I fix the garbage collector error? Package version: proxmox-backup: 2.1-1 (running...