[Satellite 6.x] 'WARNING: Snapshot rootvg-pgsql--snap changed state to: Invalid and should be removed.' warning during Satellite backup

Solution Verified - Updated -

Issue

While performing Satellite backup via the following command:

# satellite-maintain backup snapshot --skip-pulp-content /var/tmp/satellite-backup/

the backup completes successfully:

The backup is completing successfully 
Done with backup: 2021-06-06 20:55:52 +0100
**** BACKUP Complete, contents can be found in: /var/tmp/satellite-backup ****

However, the following warnings appear in /var/log/messages on the Satellite server:

Jun  6 20:46:15 satellite-serv lvm[3254]: WARNING: Snapshot rootvg-pgsql--snap is now 91.39% full.
Jun  6 20:46:15 satellite-serv lvm[3254]: WARNING: Snapshot rootvg-pgsql--snap is now 91.39% full.
Jun  6 20:46:15 satellite-serv kernel: device-mapper: snapshots: Invalidating snapshot: Unable to allocate exception.
Jun  6 20:46:15 satellite-serv kernel: device-mapper: snapshots: Invalidating snapshot: Unable to allocate exception.
Jun  6 20:46:15 satellite-serv lvm[3254]: WARNING: Snapshot rootvg-pgsql--snap changed state to: Invalid and should be removed.
Jun  6 20:46:15 satellite-serv lvm[3254]: WARNING: Snapshot rootvg-pgsql--snap changed state to: Invalid and should be removed.
Jun  6 20:46:15 satellite-serv lvm[3254]: Unmounting invalid snapshot rootvg-pgsql--snap from /var/snap/pgsql.
Jun  6 20:46:15 satellite-serv lvm[3254]: Unmounting invalid snapshot rootvg-pgsql--snap from /var/snap/pgsql.

Environment

Red Hat Satellite 6.x

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