ENH: Prohibit duplicate data keys in gs.DETS.
ENH: Prohibit duplicate data keys in gs.DETS.

dchabot/bluesky,klauer/bluesky,sameera2004/bluesky,sameera2004/bluesky,ericdill/bluesky,klauer/bluesky,dchabot/bluesky,ericdill/bluesky