Another snapshot of this volume is already created

Error

[XXXX] [info] Waiting for other Backup Job finish
[XXXX] [info] [Shadow Copy] Another snapshot of this volume is already created
[XXXX] [info] Waiting for other Backup Job finish
….
[XXXX] [info] Now Starting Normal Backup Job

Cause

Another VSS snapshot is already present on the volume(s) that are being attempted to be backed up. The volume is locked so the backup continues on without using VSS.

Resolution

  1. Clear the backup queue + kill backup processes.
  2. Restart the windows “Volume Shadow Copy” system service
  3. Run “vssadmin list shadows” – the output should say “No items found that satisfy the query”, meaning that there are no volume shadows present.