Birth allies on different continents (Sid Meier's Civilization 6)

Play 2 teams of 2 people, map continents, size small. The problem is that when creating cards, birth allies is happening or on different continents, or 3 throws on one continent and 1st in the other. To achieve the desired conditions it is necessary to create all over again, time goes from 40 minutes to 1 hour How can I fix it?