bxl-forever
Official UrbIS data from the Brussels-Capital Region confirms there are both housenumbers 17 on 19 on this building.

While the main entrance has number 19, we can see number 17 on the building near the garage door.
https://www.mapillary.com/app/?pKey=934973214021137

I can slightly move the nodes to make them match the reality better.  But it seems that erasing 17 altogether would be wrong.