Recreating Certificate for Apple Pay

Last year I started going down the path of getting the Apple Pay, merchant ID and everything setup with my personal AppleID, until I decided to make a corporate ID instead of using my personal. But I had already got the CSR from my merchant provider (authorize.net), and used it to generate a certificate with my personal AppleID.  

But now I am trying to get the CSR setup on my corporate account. But it keeps saying "this CSR has already been used". I've spoken with Authorize.net and they are telling me that they cannot give me a new CSR for the new MerchantID I've created. They want me to have you Apple remove the association so I can reuse the CSR.  I tried to say that didn't seem right, but here I am.

Anybody ever dealt with this? Can the CSR be disassociated? I have already deleted the merchantID from my personal account.