Duplicate mail id issue, mailbox does not exist when dovecot tries to generate a new guid so replication can take place

[Daniel Botting]

Hi all,

When we run the below one user constantly shows as failed (dovecot 
version is 2.2.13):

sudo doveadm replicator status "*"

mail.log shows the below for the user:

Jan  3 16:20:57 hostname dovecot: dsync-server(user): Error: Duplicate 
mailbox GUID <guid number> for mailboxes <mailbox name.sub folder> and 
<mailbox name.sub folder> - giving a new GUID <guid number> to <mailbox 
name.subfolder>

Jan  3 16:20:57 hostname dovecot: dsync-server(user): Error: Couldn't 
update mailbox <sub folder name> GUID: Mailbox doesn't exist: <sub 
folder name>

Looking at their mailbox the folder does exist.

Has anybody seen this before and would be aware of the way to resolve?

Kind regards

Daniel Botting

Codethink Ltd