I would like to transition my existing affiliate army from FirstPromoter to GHL, but I would not want their leads to become unattributed when I move the affiliates & change links.

I would like the ability to bulk import existing leads for "affiliate A" and have them get hard coded to that affiliate by email so when a sale is made, the affiliate gets credit in GHL even though they may have collected the lead when i was using FirstPromoter.