Hi Harvesterify,
this changeset has created errors in the OSM database regarding overlapping ways:

https://tools.geofabrik.de/osmi/?view=routing&lon=-2.75537&lat=47.66398&zoom=18&baselayer=Geofabrik%20Standard&overlays=duplicated_edges%2Cduplicated_edges%2Cduplicated_edges_areas

https://overpass-api.de/achavi/?changeset=146994459

This is caused by a bug in "osm-relatify", leading to duplicate streets when you split a roundabout (which is disputable anyways).

Can you please fix this?
Kind regards
Guido