Changing the Invoice Disc. Code on the Sales Header

I have added the Invoice Disc. Code to the Sales Order page. If I change the value in that field and if the order has existing lines I get the following message :

“You have changed Invoice Disc. Code on the Sales Header, but it has not been changed on the existing sales lines. You must update the existing sales lines manually”.

The Sales Line table doesnt have an Invoice Disc. Code field. How am I supposed to “update the existing sales lines manually” ?


Sales line table field #69 “Inv. Discount Amount”

I guess it’s telling you that just because you modified the header, that it’s NOT going to go thru all the sales lines and recalculate that field.

Check on Item Card and check whether you have allowed /ticked field 'Allow Invoice Disc’