Snapshot of a site errased the all database of a wp multisite

Hi,
i have 2 vhost on a virtual server. One is a wordpress multisite the second one is a wordpress mono site.
I used snapshot to backup the mono site from my dev server and run the import on my production server.
The 2 vhost share the same database. And i realise that snapshot didnt only create the new tables but has errased the multisite tables too (of course they had not the same wordpress prefix wp_ and wpsp_).
How can i revert this operation to recover my multisite database ?
thank you