Hi Davide,
this changeset has created errors regarding self intersecting ways:

https://tools.geofabrik.de/osmi/?view=geometry&lon=11.49368&lat=46.64353&zoom=15&baselayer=Geofabrik%20Standard&overlays=self_intersection_ways%2Cself_intersection_points%2Csingle_node_in_way%2Cduplicate_node_in_way

https://overpass-api.de/achavi/?changeset=155613401

Can you please fix this?
Kind regards
Guido