Hello, and welcome to OSM.

Minor geometry fixes, or more details like crossings or give-way signs are okay.

⚠️ BUT changing the road classification without discussing it with the local community is a major problem.  This should only be changed after careful review, and understanding of the consequences in the routing grid.  When a new account pops in and starts making giant changesets like that, it is usually welcomed with a bit of suspicion.

Did you talk with someone prior to engaging with major changes like here?  Where was it discussed or requested?

One more thing: a "living street" is something very specific; those streets always carry a F12a sign when entering, which has legal implications, like no parking outside parking markings, and 20 km/h maximum speed: https://www.openstreetmap.org/way/150644414/history

Please reply below this message (can be in FR or NL if that is easier for you).

Thanks in advance.