Why can't I connect ZOHO CRM to Campaigns?

Why can't I connect ZOHO CRM to Campaigns?

Hi everyone, I'm trying to synchronize the contacts I have on ZOHO CRM with Campaigns to communicate with my customers, but an error appears (attached capture screen) [In Italian it says: The organization is already integrated].

In Italian it says: The organization is already integrated


I already connected Marketing Automation to ZOHO CRM, could this be the problem?

Any suggestions?

thanks
Walter