I have an older ipad that I cannot remember the apple id or the password for. For some reason I was told I need to re-activate it. How do i activate this ipad?

I have an older ipad that I cannot remember the apple id or the password for. For some reason I was told I need to re-activate it. How do i activate this ipad? Below it is asking which device this is about and the answer is that it is for a different device, because it was set up with a different apple id which i dont remember.