Hello Nzara,
In this changeset it looks like you deleted a few pedestrian highways in the Friedhofplatz area. I believe these are required for routing purposes and not considered a violation of OSM's "One feature, one OSM element" policy. See https://wiki.openstreetmap.org/wiki/One_feature,_one_OSM_element#:~:text=Object%20oriented%20vs,with%20different%20purposes. for more details.

May I ask why you deleted them?

Happy mapping,
jmarchon