I use a directory "latest" with symbolic links to last snapshot, and it seems to be OK :
So, it's linked to the last snapshot, freshly updated.
Code:
lrwxrwxrwx 1 root root 75 Nov 21 06:00 pve_bookworm -> /var/lib/proxmox-offline-mirror/mirrors//pve_bookworm/2024-11-21T05:00:02Z/
So, it's linked to the last snapshot, freshly updated.