Should I be doing anything with the fields in authority records that begin

400 $wnnea ?

These are the fields with the old name forms, and serve to identify headings in records that need to be changed to the new form (such as adding a death date).

There appear to be two kinds: one with  |5UtOrBLW indicating they were added by Backstage, and one without this subfield. The fields without the Backstage subfield are in the official LC authority records, the fields with the subfield are not.