How can I create only one Pro Site page for the plans


The main website is :
I created 3 other websites to test : Site A, Site B, Site C
I'm installing, activing and configurating the Pro Sites plugin.

I don't see the Pro Sites page with the plan into the main website.

But when I want to see the main domain, I'm redirected to

And on this page I have 4 links to the Pro Sites Plans page on each website.
I only want Pro Sites plans on the main website.

How can I fix that ?

Pending your reply.