HI f_gonella,
this changeset has created a significant amount of errors regarding overlapping ways:

https://tools.geofabrik.de/osmi/?view=routing&lon=9.31161&lat=45.80144&zoom=14&baselayer=Geofabrik%20Standard&overlays=duplicated_edges%2Cunconnected_open_ends_1

https://overpass-api.de/achavi/?changeset=138099386

As you may know, this kind of errors irritates routing software and looks ugly on the maps. Can you please fix this?
Kind regards
Guido