[Dovecot] Converting from maildir to dbox

Hi,

We are getting the users homedir from sql ( in dovecot-sql.conf) and using the convert script we have the following settings:

mail_location = dbox:%h/dbox convert_mail = maildir:%h/Maildir

This just gives an error on all the folders saying they already exists. Does anyone have a config file where they have a working dbox configuration?

Regards,

Kjartan