Removing women from Celtic units

[Fraxinicus]

Early medieval Celts (well, I can speak at least for the Irish and Welsh, the Picts arguably may have even had matrilineal succession) were some of the most patriarchal cultures in the history of Europe, and it's completely immersion breaking when I see 1/3 of their normal armies being made up of women. How would I go about making a mixed men-women unit entirely composed of men?

[Fraxinicus]

OK, I figured out how to make existing units monogender. For my mod, however, I didn't want to completely remove women from the battlefield, and I'm also trying to add in a mixed-sex garrison unit.

The unit checks out for custom siege battles, but I can't add it to campaign garrisons, because it isn't considered a valid value in the "building_level_armed_citizenry_junctions" table, and the error message I get when trying to copy-paste the value in is, sadly, incomplete (usually these error messages tell you where you need to add a value in order for it to be considered a valid value for the current table).

Does anyone know how to mod garrison units?