Hi,
you and your group 

1) added several strange tags to buildings:
construction:date:nb
construction_date.nb
construction_date:nb
building:architecture:
building:architecture:niveau

2) duplicated many addresses that now exist twice

3) the content of "building:architecture" is not according to the documented use of the tag

Please check these issues and please point the leader of this mapping activity to the "organized mapping guidelines" which may apply to this activity:
https://osmfoundation.org/wiki/Organised_Editing_Guidelines