How to clone a multisite network with Virtualmin?

Hi,

I'd just want to know if some of you here have already succeeded in cloning a multisite network with Virtualmin ("clone virtual server" option).
I tried and changed the access for the database. But as a result I get an error message because when I want to visit mydomain.fr I get this: mydomain.fr/wp-signup.php?new=mydomain.fr

Any idea?

Best Regards