[Dovecot] Invalid cross-device link while trying to delete folder - Dovecot 2.0.7

Hi,

I'm having the following setup.

2 datastores mounted as: /home/ and /data/mail2/

I have 2 namespaces: namespace archives-baie { prefix = INBOX.Extra-001. hidden = no list = yes inbox = no location = maildir:/data/mail2/%u/Maildir type = private }

namespace { inbox = yes location = prefix = INBOX. type = private }

When trying to trash some folder from the second namespace, I get the following error in the logs:

imap(USER): Error: rename(/data/mail2/USER/Maildir/.Archives.20112, /home/USER/Maildir/.Trash.20112) failed: Invalid cross-device link

In my config I have: maildir_copy_with_hardlinks = no

Do you have a clue about this issue ?

Thanks