Ciao Fati Cho Kim
Here you've added a bunch of duplicate buildings.
For example https://www.openstreetmap.org/way/1202473147/ on top of https://www.openstreetmap.org/way/692774251/

Additionally, you have added a bunch of ways tagged with `C9=area=yes` which seems like a typo.
See https://overpass-turbo.eu/s/1zul for a list of such ways.

Could you correct this?

Greetings from Switzerland,
habi

PS: I'm here based on http://osm.mueschelsoft.de/taginfo/newkeys.htm