Lines shown on the outside Boundary

Hi all.

I have this strange thing that I'm not sure how to solve it.  I created a simple boundary object and for some reason, the line is showing outside the skin of the boundary object.


Is there a way to turn it off so that the line won't show on the outside skin of the boundary?  I know I created many other boundary objects before and it only shows the line on the edge first and lasts part of the object.   Please advise?

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