JOSM finds an error indicating that the points of the ways 209484396 “outline” and 682002688 “part” are identical (all points shared between the two ways).
Could I change something in the model, or can I ignore this validation error?
I don’t see any wrong warning when I run validator.
On the other hand those objects were not changed since 2019, so maybe you modified something and did not yet upload?
Ok, I tested and I do indeed not get a warning for this particular building. But ironically, that’s because of a mapping mistake: The entrance=main node is part of the building outline, but not of the building part outline.
Once this is fixed, I get the usual incorrect warnings:
“Ways with same position”
and
“missing tag - building relation without building tag”