Depends. I think in North Sudan, maybe parts of Egypt, Libya, and Chad there may have been AEA-ANA hybrids, but I doubt so in the paleolithic Horn which from all the available data seemed to have been a very isolated region very different from today's Horners.
I notice than Dinka seem to have some Iberomaurusian ancestry.
Maybe an indication that we carry some ANA on our Nilotic side aswell or just false signal from recent Eurasian ancestry?