Thank you for confirmation!

I now changed the names according to your instructions above, see https://www.openstreetmap.org/changeset/160947436#map=16/48.77957/2.09820

Please note that I didn't change the name yet for the segments further in the south here: https://www.openstreetmap.org/way/22675305#map=18/48.767370/2.068825 
I used the search functionality of JOSM for  the name replacement, but intentionally didn't apply the name change for these  segments as they seem to be too far awway. Or shall I also change the name here?

Good luck with your JOSM attempt! I recommend watching an introduction video before starting. People say that JOSM is more difficult to use compared to ID, but for me the opposite is the case.