Default skybox weird circles

I just transfererad a project from UE4 4.7 to 4.10 and I’ve noticed a weird circle pattern that appears in a line from one side to the other och the skybox, diagonally between the X and Y axis, up and around.
How can I make this dissiperar?

One reason you are seeing those lines might be because you have 2 BP_Sky_Sphere’s in your scene and they are fighting each other for the same space. Click on the (Eye) icon next to one to set it to not visible and it should go away, if it does one will need to be removed to correct the issue you are having.