[sylpheed:36124] Duplicate Inbox Folder

[Martin Vegter]

Hello,

I am using Sylpheed + IMAP to connect to my mail server (Postfix +
Maildir + Dovecot).
On my server in the user's mail directory (~/mail/), there are 5 folders:

 ~/mail/Archive
 ~/mail/Draft
 ~/mail/Inbox
 ~/mail/Sent
 ~/mail/Trash

In Sylpheed, I can  see all 5 folders all right, but I see Inbox twice -
see attached screenshot.
Both inbox folder contain the same messages, but I am unable to delete
either of those.

Can somebody please advise how to get rid of the duplicate folder?

thanks,
Martin