Living Grimoire's bane

[Teratoma]

So I'm playing a Living Grimoire Inquisitor and I wanted something clarified. For my Sacred Word ability, I can add bane to my holy book, but I can only choose one set of enhancements per day as a Warpriest does. Does that mean I can only choose bane against one group of creatures per day, or could I change that bane when I activate Sacred Word again later? Basically what I'm asking is if bane against different creature types count as different enhancements.
For example, if I activate Sacred Word and give my book +1, shocking, and bane (humanoids: Orcs) could I later make it into +1, shocking, and bane (undead)?

[Melkiador]

I don’t think there is any official rule on this, but the general consensus seems to be that the choices are locked in as well. The closest precedent is the paragon surge FAQ which locks the choices in.

ARG FAQ wrote:

Half-Elf, paragon surge: Can I cast paragon surge multiple times in a day to gain different benefits?

No. The first time each day that you cast paragon surge, you must select a feat and make all the associated choices that come with it. Once that choice is made, it is set for the day and additional castings must make the exact same decisions.