Tatsächlic Kieselsteine osm.wiki/File:Pebbleswithquarzite.jpg?

Changeset reverted with changeset/166574426 - restored 3 deleted member ways of boundary relations.

oneway ergibt keinen Sinn bei Flächen
relation/9921601

War es Absicht, dass Du folgende Wege gelöscht und damit das railway-Multipolygon relation/6838462 verstümmelt hast hast?
way/463049060
way/45263051
way/448809564
way/463049055
way/463049048
way/463049061

Da ist wohl einiges schiefgegangen:
https://tools.geofabrik.de/osmi/?view=areas&lon=11.90282&lat=52.59044&zoom=18&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=duplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways%2Cduplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways
Sieht mir ganz nache ienem missglückten Import aus. Jede Menge verwaister Knoten/überschneidende Linien.
Bitte unbedingt JOSM-Validator beachten.

changeset/164375199

Please map more carefully.

Which properties qualify way/212569318 as a motorway (highway=motorway)?

relation/18840915
This is not a multipolygon. Multipolygons are relations of polygons (closed rings) with at least one member in the role outer. They are intended for surfaces.

Please work more carefully:
https://tools.geofabrik.de/osmi/?view=areas&lon=-73.73747&lat=45.35639&zoom=16&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=duplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways%2Cduplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways
And please do not overlap areas with identical key natural or landuse.

Das sind keine Multipolygone:

relation/18810840
relation/18808048
relation/18806833

Multipolygone sind für Flächen. Sie haben nur Polygone (geschlossene Ringe) als Mitglieder!

Your updates have probably failed:
https://tools.geofabrik.de/osmi/?view=areas&lon=-63.76396&lat=44.62007&zoom=13&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=duplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways%2Cduplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways

Bitte Wege nicht mehrfach mit widersprüchlichen Eigenschaften erfassen:
https://tools.geofabrik.de/osmi/?view=routing&lon=11.75209&lat=49.36923&zoom=18&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=duplicated_edges
https://tools.geofabrik.de/osmi/?view=routing&lon=11.75240&lat=49.39493&zoom=16&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=duplicated_edges
https://tools.geofabrik.de/osmi/?view=routing&lon=11.77846&lat=49.37604&zoom=18&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=duplicated_edges

Please fix:
https://tools.geofabrik.de/osmi/?view=areas&lon=-73.69261&lat=45.40418&zoom=18&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=duplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways%2Cduplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways

By the way: JOSM provides a validation tool which detects such issues before data upload

Wenn Du Teile von Multipolygonen löschst, kümmere dich bitte auch um den übrig gebliebenen Rest:
Stand vor deiner Bearbeitung: https://overpass-turbo.eu/s/1ZaN
Stand nach deiner Bearbeitung: https://overpass-turbo.eu/s/1ZaK

Multipolygone kennen nur member mit den Rollen "outer" oder "inner"

Es ist nicht vordringliche Aufgabe von OSM, ein bestimmtes Kartenbild zu erzeugen, sondern möglichst realitätsgetreue topographische Daten zu erfassen. Und ein Acker oder Wiese endet nunmal spätestens am Straßenrand.

Was hat denn das way/49043465 mit der Stadtmoosach zu tun. Und warum tagged man das als etwas, das es nicht ist? Etwa nur weil einem die Signatur in der gerenderten Karte gefällt?

… und dabei das Multipolygon zerstört https://osm.mapki.com/history/relation/16229671

Und was ist mit dem Rest relation/6797225#map=13/48.83071/15.61738 ?

Bitte sorgfältiger bei der Bearbeitung der Grenzrelationen vorgehen: https://tools.geofabrik.de/osmi/?view=areas&lon=13.16100&lat=47.15816&zoom=9&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=duplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways%2Cduplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways