I would claim that these highway lines are mainly sharing the same space. This same thing has happened many times elsewhere as well where snowmobile tracks (I guess mainly for the kelkkareitit.fi service) have been drawn. The tracks are often drawn without any respect to existing ways and often provided with highway=path/track tagging creating overlapping duplicate ways like this. I would merge these two features into one wherever possible. These seem like forest roads that aren't snowplowed during winter time so I guess they're used for snowmobile tracks.