Hi dada24

I have fixed this and two more buildings near it where you have used key "buildingpart" instead of "building:part". There are more issues like this which showed up after your edits so please take some time to fix those. 

Also I fixed outline of the building to cover whole area of that specific building and then left different parts within it with their own properties. You can see those changes in this changeset:

https://www.openstreetmap.org/changeset/162533370

Also important thing to note. I have seen that you deleted previous outlines of the buildings which were added in 2013. Please do not do that. Try to preserve old elements, in this case outlines of buildings, and then move/refine their geometry if needed. Deleting objects should be used as last resort, because it can lead to losing various details by accident or simply losing history and making it hard to see who previously worked in the area.