Unfortunately on another CRM Potential, I am completely unable to associate the existing Project. 

I click Associate and follow all the steps and then I hit save. 

Then I get an error message stating that "You cannot have the same email address for more than one client."

I cannot find where the email addresses are the same. That potential doesn't even have an email address, but I put a fake one in just to test it, and it still wouldn't work. 

Where do I attempt to locate this duplicate email address that is preventing me from associating the Project to the CRM Potential?

Thank you.