I understand your comments and will take them into account in my future contributions, thanks.

All the changes made were suggested by the "warning tool" (sorry, I don't know how it's called), even the edit you mentionned on the parcel locker.

Globally, I updated obsolete attributes or added some like healthcare, brand/operator name/Wikidata, as the tool suggested.
I tried to keep a critical mind on what I was doing and didn't make some changes that need field check (I'm not from Poland!).

These are my first edits on OSM so I try to keep it simple to understand how it all works, step by step.