I am using doveadm backup to backup the mail server's files for a specific user. This is a test environment for the backup machine. All it does is sit there until I run backup on the mail server. However, I am encountering an issue occasionally where backup throws the following message:

Warning: Deleting mailbox 'Deleted Messages': UID=533920 already exists locally for a different mail: GUIDs don't match (1739791386.M526904P56414.checkout,S=2206,W=2264 vs 1739674845.M569094P6598.mail,S=6530202,W=6615064)

At this point it stops and the indicated mailbox has been deleted. It is not always the same mailbox. I then have to run the backup again and wait for it to download the entire directory which takes a long time. I was hoping to use this approach for a frequently run backup, but it appears it is not feasible. Some mailboxes are large enough that a second backup would be initiated before the complete reload had completed. Can this be corrected?

-- Doug