Is it possible to copy the invoice discount fields from "Sales Header" table (Field No. 121 "Invoice Discount Calculation" and Field No. 122 "Invoice Discount Value" fields) to the "Sales Invoice Header" (Posted Sales Invoice) as well?

Background: If we have an invoice discount set in the form of a percentage on the sales invoice, that data is permanently lost by posting, i.e. we only have the amount of the discount distributed on the lines (Inv. Discount Amount field). The basic principle should be that the posted invoice preserves and clearly shows all the calculation parameters used before posting, as well as the original percentage that was the basis for the calculation.

See also https://community.dynamics.com/forums/thread/details/?threadid=40c641ca-3931-4f42-b53d-d4281673f02c