Hallo supsup,
making sub-realtions on an via ferrata relation is not an good idea.
The main relation and also the starting points are broken now; see e.g.
https://www.xctrails.org/map/map.html?type=allferrata&trail=10588521
So I would strongly prefer to move the tags in the lines and to remove the sub-relations.
Greetings
Matthias