Backup Job Fails After VM Restore

Product version: 11.1

Last modified: 29 April 2026

Problem

A backup job fails for a virtual machine restored in Proxmox VE with the following error message:

Backup failed: "Proxmox VM UUID mismatch"

Background

After a VM is restored in Proxmox VE, it may receive a new SMBIOS UUID.

NAKIVO Backup & Replication uses this UUID to identify virtual machines and link them to existing backup chains. When the UUID changes:

• The restored VM no longer matches the original backup chain

• The system detects an identity mismatch

• The job is blocked to prevent backup chain corruption

Solution

To resolve the issue, reconfigure the backup job and select the restored VM as a new source object.

1. Edit the backup job.

2. In the Source step, remove the original VM from the job.

3. Select the restored VM from the inventory.

4. Proceed through the job wizard and save the changes.

5. Run the backup job. The backup job completes successfully

A new backup chain is created for the restored VM. Existing backups remain unchanged and available for recovery.