iTunesConnect: cannot transfer app because of “You must turn off TestFlight beta testing for the app that you want to transfer”

Question

Below you can see that testing for external testers are turned off:

same for internal testing:

but when I transfer app, one of the criterias are not me

Answer 1

i had the same issue i deleted (mark expired) all the versions of app testing version in App TestFlight section and done the trick for me ;) attach is the screen shot of activity.