W22 is a value for a matrixed item/product. It's already available at the parent level, but it needs to be appended for a subset of child-items
@Merik Ducker, Thanks for the info about Overwrite Sublists -- that makes sense.
I was hoping to have to do an export of all the existing records in NS, since I'd have to run a search for each ID as a list.
For a little more clarity:
W22 is our 'sales season' indicator -- so "winter 22" is the defining value to show that something is on sale during that period.
So, the business decides which products we will continue to sell in w22, and that decision needs to be reflected in the system.
This multi-value field is what controls that.
So, I could export ALL items from netsuite, clean it up in an excel file, and re-import with the full 'Sales Season' values, but that's a bear.