NetBackup status code: 6689
Message: MongoDB topology has changed since the last backup. You must create a full backup.
Explanation: During an incremental backup, NetBackup discovers the topology and compares it with previously backed up topology. NetBackup fails the incremental backup if the MongoDB topology gets changed (For example: addition of new shards or removal of existing shards).
Recommended Action: Run a full backup if the topology has changed. Following a successful full backup, an incremental backup should be possible.
Click here to view technical notes and other information on the Cohesity Technical Support website about this status code.