SAP Migration Cockpit Additional Field Vendor Master

Dear ...,

I'm migrating vendors with the MC. All works fine. However I'm now trying to add field: FLG_NOUSE to the email addresses I'm trying to migrate.

What I've noticed. In the template I'm populating the 1st sheet, however in LTMOM the additional address data is mapped. So there is some logic which I can't find.

When I add FLG_NOUSE to the SUP_GENERAL it does not work as all other mapping including the split is based on the additional address.. when I add to additional address is appears in the template on the wrong sheet. What to do

Thanks a lot

Maikel