Updated Ring App now cannot add the device(camera)

had to update the ring app on my android phone then after updating it i had to set up camera all over again----the main problem is now i have changed the original email that was attached to the camera in original set up and now when i try to change to my new email and create a new account it says the camera is already registered to another user when i scan the QR code on the camera--- i cannot seem to add the camera without getting this message i maybe mucked this up myself any ideas how to solve this problem?? Garry