Hello - it's hard to explain without visuals, but take 6 The Uplands as an example:
https://www.openstreetmap.org/way/1381713422

Two of the nodes in the perimeter way have addr:housenumber and addr:street properties:
https://www.openstreetmap.org/node/12792117571
https://www.openstreetmap.org/node/12792117576

I guess this is because you've copied and edited the way from another on Silchester Road. The address properties on the nodes should be removed, since you've already got address properties on the way as a whole.