"Search for a ancient artifact" mission requires a hive npc kill there aren't any in Deneb and the system/sector map indicates that there's hive bots in the belts when belt/certain planet sectors are moused over.

Best fix would be to remove all mention of hive bots in deneb belts (there haven't been any for at least half a decade now ever since the addition of fogged belts and serco/itani turrets)

And to make the mission specify that hive bots can be found in the adjacent systems.