You didn't dig deep enough:
https://www.openstreetmap.org/note/4517333 (probably this hint here was needed for solution)
and because of the company-history i think https://www.openstreetmap.org/node/8974563865 are related too and both are not entered by katemor.
Simply stating, that these hint is not deleted and can still be linked to if the "publish hint & close"-button is pressed would have helped. 
FYI the POI in Warszawa has now ceased to exist, so NOW really nothing is to be done here.
