[nova] instance not recoverable when its image backend got deleted

For an Openstack VM instance, if its backing image got deleted already, and this VM instance was already hard rebooted, and went into `Error` state due to `Image not found` error. Is it possible to recover this VM stucking in this bad state? I tried to create a vm snapshot, and then try to rebuild this VM using the newly created vm snapshot, and it kept failing. Regards, Hai