I do not have any tables that I can export that are named "Entity". Here's a shot of my options.
I could go through all customers manually? But that would take a lot of time. Is this a bug or something? Why would duplicates cause tables not to be allowed?
Hmm. My screen shot isn't showing up but the list contains account, activity, cmpaign, cases, class, customer, customer and customer lead, email template, employee, itemservice, listbuilder, opportunity, solution, tenant, vendor, vendor and vendor lead, and vendor lead.