Object identifies as SkySPhere when clicked

Hi there,

Pls see attached pic showing the thin lined with dot ‘object’ in scene that I can’t delete,and I wonder if indeed its causing my world comp not to work, wherein my two terrains do not ‘stich’ right but one terrain which is right on the ‘edge’ of one side of terrain ( +X via world comp ,right click ) yet the ‘z’ value is way too high, causing the problem.

Any ideas what on earth it is, why it seems tied to skysphere given when I carefully click on the dot(square?) thing in center of the line that it highlights skysphere, and deleting skysphere does not get rid of it ?