Hi Giorgio 1964,
this changeset has created several errors in the OSM database regarding overlapping ways:

https://tools.geofabrik.de/osmi/?view=routing&lon=9.96118&lat=45.57957&zoom=14&baselayer=Geofabrik%20Standard&overlays=duplicated_edges%2Cunconnected_open_ends_1

https://overpass-api.de/achavi/?changeset=134129948

As you may know, this kind of error irritates routing software and looks ugly on the maps.

Can you please fix this?
Guido