BP Sales Area OWN DATA

Hi,

I want to change in BP for examle. Incoterms with mass/massd transaction.

1. The problem is that mass is not going to change it (add values) when the initial value is "empty"

2. Also when I click buton "delete own data" all fields are filling up with data which comes from "Reference BP" (which is good

SO pls help me how to :

1. Mass add values for empty fields od sales area data or

2. Mass "click" on "delete own data" for specific BP id numbers.