Two multi sites on one shared hosting

Hello, I have primary.com and secondary.com on a single IP, Shared Hosting; each one has installed WPMU. Both of them have wildcard DNS. Both domains are working fine except subdomains of secondary.com. When I’m trying to enter to the subsite of secondary.com it redirects me to a register page of the primary.com

Secondary.com it’s restored backup of Primery.com. I used Snapshots plugin.

Any thoughts, please.

thank you