Proxmox HA settings are ignored?

[oscarm]

I am backing up some vms that are residing on a Proxmox cluster. They all have been set up in HA.
If I remove a vm and restore it, all is restored, but it seems the HA part of the config does not get put back.

If I restore a vm that still is present I get a warning it will remove the VM prior to restoring it. In the end the restore fails with the message "Failed to perform restore. unable to remove VM-XXX - used in HA resources and purge parameter not set".

am I doing something wrong, or is HA not supported by Veeam?