Harvesting SDE metadata: topic categories are put in keyword_s

[YinShi]

After harvesting SDE metadata to Geoportal, I noticed topic categories were harvested to keywords_s field, i.e. the numeric values were topic categories. Is there any way I could harvest only keywords to keywords_s field and topic categories to another field in Elastic Search?

"keywords_s": [
"National Interest Land Mass",
"NILM",
"Masse des terrains d'intérêt national",
"MTIN",
"003",
"013",
"015"
],

I am thinking maybe collections and collection field names would rearrange the mapping but I am not sure.