backup and restore


im trying to simulate backup and restore vm based on this document [Managing Virtual Machines Backup — OpenNebula 6.0.3 documentation]

im using S3 MarketPlace and the backup process works fine . the problem is when i tried to restore the process ends up fine with no errors but im getting vm with storage size of 1MB and boot failed : not a bootable disk | no bootable device .

im using OpenNebula with 1 host and internal storage
any ides someone ?