Thank you! I corrected it about a week later.

I accidentally marked multiple 7546 in the area (-> corrected to 7524).

I was also very new to StreetComplete, and:

- I had no idea Notes were public!
-- (Thought they were only on my local device.)
- I had no idea how to "Undo" in StreetComplete.
-- I know how to now! :)