Hello,

Welcome to OSM.

What are attend to do here ? you deleted building 7 and add a strange name "co-ownership" is it realy the name of the building ? 

Also in another edit you add layer=1 to avoid warning but it's not how that works. 

In Brussels and in general in Belgium we don't add postal code or city this value are computed so no need to duplicate this data. 

I recommand you to read this https://multimob.be/uploads/osm-handbook.pdf before making another major edit.

Have a good day
