Sorry about the confusion.
That means that the
PCM box code programming you currently have is no longer used and the base code off the chip is now the base programming.
For example, if you had a NAW6 code on your
PCM, you probably have TDE1 programming on the chip so you basically have a TDE1
PCM as long as the chip is in. Being as you have a 97, you may have already started with a TDE1 though.