Among the changes you've made here you've changed the capitalisation of https://osm.mapki.com/history/way/208731874 as you can see, that has been changed back and forth several times.

What is the problem exactly?

Migliorati tag e aggiunto informazioni 
I'm sorry, but the changeset comment has a size limit, I can't describe everything I changed in detail, so I simply summarized to the best of my capacity the general contributions I've made. I can tell you I didn't touch any place outside Valsesia, so I don't know why the changeset seems to include also parts of Aosta Valley.