How can I remove/hide this line on a cropped section view?

Per the title, I have cropped section view with a line that I cannot select, so cannot hide, nor change colors:

It seems to be part of the crop sketch, but changing that line's color does nothing.

If SortaWorks retained every line of the crop sketch, that would be one thing, but this makes no sense.

How can I make this line disappear?

SolidworksDrawings And Detailing