I finally got up the nerve to cut into my quilt. When I flipped the quilt over to see if I could slide the pin between rows of quilting to get to the edge I saw how close it was to the seam on the backing. I try to use fat backs so was happy to see that this backing needed to be pieced.
The end of the scissors are at the head of the pin. It will need to slide up and over to the right.
There's the little opening I made.
And here's the offending pin.
I used very fine thread to stitch the opening shut.
Good as new...I hope. Here it is in the original photo taken on a sunny July day.