How do I get a save body (as part) to update to the original part changes?

I had a 3-body part, and saved out 2 of the bodies as separate parts using body save as part.  They show out of date with a stoplight, but I cannot figure out how to get them to update.  I tried edit in context, CTRL-Q in every location I can think of, and a barrage of other things, but nothing worked.  Can anyone shed some light?  The feature is useless if it won't update.  SWX 2012 SP5.

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