I have some weldments that I have been working with for a few weeks now. Two weeks ago there was a large design change that reduced the outer perimeter of the part. After saving these parts as well as closing and re-opening SolidWorks several times, they load incorrectly when they are opened in lightweight mode as part of the larger assembly they belong to.

I could easily ignore this if it were some small internal difference, but there are internal pieces from the old structure floating out in space.