Apple id on Ipad

Hi

maybe i have a different apple id on my ipad than that of my phone

my ipad is on aviation lock mode and i forgot the apple id that was used for it. It was connected to the apple id of my phone but its showing that it is incorrect so i have removed the ipad device from my phone through icloud. I cant open my ipad now and i dont know the apple id email. The picture shows that my apple id is connected to my old phone and my new one and the ipad and when i put this apple id on the ipad it tells that its wrong