Ghost email notification on a form

Ghost email notification on a form

Hello, 

We have recently encountered an error where I can not see a email notification set up for a form which I am currently the owner, although neither the form nor the notification were created by me. However, neither can the Super Admin access the notification; they can only see the one I created later. Therefore, on each new form submission, two emails are being sent, but I am not able to disable or remove the old notification that we no longer want to use.

Since there's no public Forms API, there's apparently no way for me to find and change that old notification.

If anyone is able to share a solution to this problem, I would greatly appreciate it.