$ sudo autorestic -vvv forget --prune -a
repository b0ca7112 opened successfully, password is correct
unable to create lock in backend: repository is already locked by PID 886695 on pica01 by root (UID 0, GID 0)
lock was created at 2022-06-10 08:19:04 (654h30m9.367618574s ago)
storage ID 48ba5a2f
the `unlock` command can be used to remove stale locks