Ignore "duplicate housenumber" for node "entrance"

[MichaelFS]

for an existing building an entrance is mapped, this node should have addr*-keys (ref. ​OSM-Wiki). Typically, the building also has addr*keys (ref. ​OSM-wiki.
In such cases, after any modification for the node "entrance" or the way "building" JOSM claims an error "duplicate housenumber".
In my eyes, JOSM should not run the "duplicate housenumber"-test for nodes "entrance".

[taylor.smock]

We can probably fix this by modifying Addresses.java​. I don't know if we would want to consider entrance as a POI, but I can see arguments either way.

[stoecker]

I'd say mapping the house number to an entrance makes no sense except you have more than one entrance with different numbers in which case mapping the house number to the building makes no sense. So the warning is valid.

For single entrance buildings map the entrance without any additional tags. The tags go to the building. For multi entrance buildings with different numbers map the numbers to the entrance, but not to the building.

The first wiki page you link also states this:

Add a node node at the building outline and tag it with entrance=yes.
The house number should be added at another node in the building or at the building itself.