However, when I tried to restore the "ssh" VM, I got the following error:
qubesadmin.backup: -> Restoring ssh...
qubesadmin.backup: Extracting data: 105.4 MiB to restore
qubesadmin.backup: Error extracting data: retrieved backup size exceed expected size, if you believe this is ok, use --ignore-size-limit option
qubesadmin.backup: Continuing anyway to restore at least some VMs
qubesadmin.backup: -> Done. Please install updates for all the restored templates
After this, I have an "ssh" VM, but it's empty. Or rather, it contains the default content as if I had manually created a new VM based on some template.
I then deleted the "ssh" VM and restored using the --ignore-size-limit flag. The output was different, but the end result was the same:
qubesadmin.backup: -> Restoring ssh...
qubesadmin.backup: Extracting data: 0 to restore
qubesadmin.backup: -> Done. Please install updates for all the restored templates
Again, the "ssh" VM was created, but it just contained the default content just as in the first case.