[Dovecot] Modifying mailbox GUIDs?

[Faheem Patel]

Greetings all, 

I can view a mailbox's GUID like so: doveadm
mailbox status -u  guid  

However, how may I *modify* a mailbox GUID?
Can this be done using doveadm or some other tool? 

If not, how may I
go about modifying the dovecot.mailbox.log (where I assume GUID data is
stored)? 

My specific use case has to do with me wanting to modify an
existing mailbox's GUID so that its messages are mirrored into a folder
of the same name using "dsync mirror". (As we know, dsync utilizes GUIDs
to determine mailbox uniqueness) 

Thanks! 

-- 
 - Faheem