In the case of System Restore, is it able to overwrite whole of backup data to target VM?
If you want to create a VM which whole overwritten, at the time rebooting OS after the completed full system restore, please select FSR_<kernel file name> on grub menu on select kernel view and then boot OS.
In specification of full system restore, restore whole of backup data to /mnt after mount vda1 to /mnt.
After that, select FSR_<kernel file name> on grub menu on select kernel, mount vda1 to / and OS will boot with same as last backed up configuration.
Reference：Tutorial -- Use Backup Service
After restoring, boot the Web console and reboot the server. During booting, select [ FSR_<kernel file name> ] by using ↑↓ keys at the boot OS select screen of the Web console.