[Dovecot] doveadm backup - Fatal: All your namespaces have a location setting.

[Tobias Hachmer]

Hello list,

I am using dovecot v2.1.9 and have a problem with doveadm backup:
# doveadm backup -u u...@domain.com 
maildir:/backup/domain.com/user/Maildir
doveadm(u...@domain.com): Fatal: All your namespaces have a location 
setting. It should be empty (default mail_location) in the namespace to 
be converted.

Here my namespace config:
namespace {
  list = children
  location = 
maildir:/var/vmail/%%d/%%n/Maildir:INDEX=/var/vmail/%d/%n/shared/%%u
  prefix = Gemeinsame-Postfaecher/%%u/
  separator = /
  subscriptions = no
  type = shared
}
namespace inbox {
  inbox = yes
  location = 
maildir:/var/vmail/%d/%n/Maildir:INDEX=/var/vmail/indexes/%u
  prefix =
  separator = /
  subscriptions = yes
  type = private
}

Have I got a problem with my namespace config?

Regards,
Tobias Hachmer