Prevent Animation Tab From Changing the position of an object

Hello. I am quite new to Unity. I am using the latest version. When I try to make a door open animation, it goes well with rotation. But when I add the position property it takes it to the Vector3 - (40,12.5,7.5) - instead of (10,2.5,15) at the first frame. I try to change the value but it returns to it after I write. Please Help Me