Hello,
You've changed the tags on https://www.openstreetmap.org/way/949631071/history , the spillway adjacent to this hydro power station in Derby from "waterway=spillway" to "layer=-1;tunnel=culvert;usage=spillway;waterway=drain".  I don't recall this has being underground, and wikipedia's picture from the opposite back suggests not either: https://en.wikipedia.org/wiki/Longbridge_Weir_Hydro#/media/File:Longbridge_weir_Hydroelectric_Plant_geograph-3480856-by-Ian-Calderwood.jpg .
I suspect you'll need to either revert your changes wholesale or check each of the 300 items you edited (checking with the local community or surveying) to make sure that your edits are correct.
Best Regards,
Andy
