This may be a imported location used as a Power Spot for D and G Max battles. If there’s no stop/gym there currently, and the L17 S2 cell is empty, then your nomination shouldn’t be marked as a duplicate and should go into queue. We do not see Power Spot imports on the database map, as they currently are not on the it.
The orange ! can either be unused Wayspots or imports. Imports will usually not have an image, and some may not be in the database map, as they are not used by all games. Imports used as Power Spots still will have this listing, no image and existing Wayspot, but they technically aren’t Wayspots as they are just used for Power Spots in PoGo.
We have had others here submit POIs that were imported as Power Spots into PoGo and meet Wayspot criteria, and most don’t have much of an issue getting them into queue. There have been some that get rejected as a duplicate, but it’s rare and tends to happen on appeal.