u/Accomplished_Bag_897

So I've had this empire spawn from the pre-ftls when the AI finds their system. But this run I found them first, took Sol X and now they just sit there as Pre-Ftls. Any way to get them to become a regular empire without invading them? They won't spawn their fleet or go no contact if they already are space faring. And I've got like 3k fleet cap. I don't want to wait till I have jump drives. Any advice?