Hi nicoroger07,
this changeset caused errors in the OSM database regarding self intersecting and overlapping ways:

https://tools.geofabrik.de/osmi/?view=geometry&lon=9.14791&lat=42.09531&zoom=14&baselayer=Geofabrik%20Standard&overlays=self_intersection_ways%2Cself_intersection_points%2Csingle_node_in_way%2Cduplicate_node_in_way

I have removed the added way to fix those issues.

Please make yourself comfortable with the basics of OSM before you continue:

https://wiki.openstreetmap.org/wiki/Beginners%27_guide

Kind regards
Guido 