Back in the days of myth, the divinity keys would often seem to pass from owner to owner or else there we’re more of them back then. Or more of the better ones.
When Zeus threw a lightning bolt did he call upon the same powers that Thor did? Or were they two separate items? Were they even items or some inherent alien metabolism?
Gods can live for a long time but not forever. It is possible that the myth of Hekate as she moved from Egypt to Greece and onward was the travels of a single woman but more likely those changes in location and attitude reflect her divine key passing from owner to owner.
It is possible that the current gods hold those ancient artifacts and many claim to. Even so it is impossible to know for sure. Much better to save that energy for the dream eaters anyway.