Agreed. - I only changed highway=path to highway=via_ferrata. The conflicting keys (ferrata scale 3- and SAC scale T3) were already there.

After a little research, I have the impression that the core part of Hindelanger Klettersteig ends 200 m NE of Gratkopf (border T4-T3), see https://www.ok-bergbahnen.com/aktiv-sport/klettersteige/hindelanger-klettersteig.html

However, many more highways are labeled as the Hindelanger Klettersteig (leading almost to the Heubatspitze).

To complicate things further, we have also a relation 1422977 labelled "Hindelanger Klettersteig".

I think, the via_ferrata_scale should be removed from all segments beyond the point NE of Grafkopf, leaving only T3 (and from the relation).

I am not familiar with this area. Shall I proceed with this or open a hint on OSM for someone local to clarfify?