I didn’t. It’s from an asset pack. 
I think cast dynamic shadow was on by default (?) And static lights I thought never cast a dynamic shadow because they’re not really lights but paint on the texture?
Seems like the wall is casting shadows on itself. As you get closer they become increasingly 3D. If a light is too bright/close it looks really bad. The contrast gets so extreme. One option I found is to tell the wall itself not to cast a shadow. But haven’t tested that enough to see if there’s a downside. Like what if there’s a corner wouldn’t you want there to be a shadow there, hmmmm…
That may be the answer though, either wall no cast shadow or make sure lights aren’t too bright.