[Dirvish] One of the vaults broken - init enough?

[Rolf-Werner Eilert]

I hope this list is still alive...

Some time ago I received a

21:45:44 /usr/sbin/dirvish --vault backup-home
backup-home:default:20210727-2145: 
/mnt/backups/backup-home/dirvish/lock_file already exists

on the /home vault. After some days I looked it up and yes, I found a 
lock file and deleted it, but it had no effect. So I decided to initiate 
the /home vault again, then let it backup (only /home) once and went 
into holidays.

Since then I get

21:24:51 /usr/sbin/dirvish --vault backup-home
backup-home:default:20210830-2124: ERROR: no images for branch default found

Guess I messed it up, but how can I re-initiate the /home? Of course, 
the cronjob starts dirvish-runall, so do I have to expire all of them 
first, then initiate again?

Thank you for your help!

Rolf