Hi RubenMarc,
this error still exits, can you please fix this overlapping way?

https://tools.geofabrik.de/osmi/?view=routing&lon=-3.80902&lat=40.94244&zoom=14&baselayer=Geofabrik%20Standard&opacity=0.66&overlays=duplicated_edges%2Cduplicated_edges%2Cduplicated_edges_areas%2Cunconnected_open_ends_1

Kind regards
Guido