Other carriers usually won't change the frequent flyer number (FQTV) on an award issued with their own miles.

That option has worked in the past on paid tickets.

FQTR (R for redemption), FQTS (S for status), FQTU (U for upgrade), and FQTV (for mileage accrual) (frequent traveller) are different fields in the global distribution system (GDS), of which the "big three" are Amadeus, Sabre and Travelport. Not every airline allows all fields to be used.

https://en.m.wikipedia.org/wiki/Glob...ibution_system

https://www.siteminder.com/r/global-...bution-system/