Dipak Kumar Pusti

In the initial period of Jio preview launch, i had a jio number with which I updated my primary gmail id, later for some reason and I stopped using that number and that number got deactivated, problem is i don't remember that number either. Now i am using another jio number full time and everything else works fine except email id updation in my jio account. When I am typing that gmail ID it is saying This email ID is already registered. is there any way to detach email ID from old account and add it to my new number ?