If Vault tapes that have not expired are injected back into a robot, you can revault them manually.
To revault unexpired tapes
Return the media to your vault vendor so that all backups on that media are available for future disaster recovery.
Run the Recovery report to ensure that the media is available for future disaster recovery operations.
Alternatively, you can use the vmchange command to eject the media and transfer it to the offsite volume group.