Sometimes you need to duplicate a personal name authority and turn it in to a subject heading (for biographies) - but there is no easy way to do this. We have 'edit as duplicate' for cataloging, but not authorities and should probably have it for both.
This makes sense as a feature. For the non-MARC21 catalogers, I just wanted to clarify when Nicole says "turn it into a subject heading" she is referring to adding free-floating subdivisions to the name for precomposd headings, not actually changing the authority type.
*** This bug has been marked as a duplicate of bug 10600 ***