Vincent de Phily
Yes, I understood you were talking about the old one. If you've walked it (not just seen the start of it from where the note is), then you're in a better position than me to edit it :)

I imagine that the first and last ~300m are still visible and should be kept. See also https://wiki.openstreetmap.org/wiki/Key:trail_visibility https://wiki.openstreetmap.org/wiki/Key:sac_scale and https://wiki.openstreetmap.org/wiki/Key:surface

Want to give the edit button a try ? It's surprisingly easy. If you prefer not to, just say so here and I'll make that edit as best as I can see using imagery.