please check https://tools.geofabrik.de/osmi/?view=areas&lon=-62.55646&lat=44.85302&zoom=15&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

please look at https://tools.geofabrik.de/osmi/?view=areas&lon=14.47093&lat=46.39687&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

siehe https://tools.geofabrik.de/osmi/?view=areas&lon=13.30914&lat=52.42826&zoom=18&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=intersection%2Cintersecting_segments%2Cways

siehe https://tools.geofabrik.de/osmi/?view=areas&lon=8.97335&lat=49.69782&zoom=17&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=intersection%2Cintersecting_segments%2Cways

siehe https://tools.geofabrik.de/osmi/?view=areas&lon=10.86470&lat=48.03115&zoom=18&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=intersection%2Cintersecting_segments%2Cways

Da sind wohl Dinge vermischt worden, die nicht zuammengehören:
https://tools.geofabrik.de/osmi/?view=areas&lon=9.04278&lat=51.68813&zoom=14&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=intersection%2Cintersecting_segments%2Cways

Am besten den Änderungssatz revertieren, da ist einiges schiefgelaufen (JOSM-Validator)

Bitte Verbesserungen verbessern:
https://tools.geofabrik.de/osmi/?view=areas&lon=10.43043&lat=53.28167&zoom=17&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=intersection%2Cintersecting_segments%2Cways

You seem to have misunderstood the concept of multipolygons. Multipolygons are designed to represent areas. The relation may only contain ways as members that form closed rings. At least one of them must have the role "outer". Rings within outer rings are assigned the "inner" role. In this case, the areas of the inner members do not belong to the area represented by the multipolygon. Therefore
relation/17355403 is not a valid multipolygon because way/1246848233, node/5148538660, node/5148538661 and node/5136318266 are not valid members.
In addition i think, the areas of the buldings are part of the industrial landuse, not excluded.

Please check and fix:
https://tools.geofabrik.de/osmi/?view=areas&lon=13.01087&lat=46.66625&zoom=15&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

relation/17035075
Warum hier überhaupt ein Multipolygon? Hier sind zwei eigenständige Parkflächen mit unterschiedlichen Eigenschaften. Mit dem Multipolygon kommt jetzt noch ein Parkplatz mit eigenen Eigenschaften dazu, die für beide Teilflächen gelten. Ausserdem ist das Multipolygon formal falsch. Es enthält nur Mitglieder mit der Rolle inner und das zwingende outer-Mitglired.
Das gilt für noch weitere Fälle.

Was soll das noexit
- an einen waterway
- noch dazu am Anfang?
Wenn das den Wasserlauf versperren soll, woher kommt das Wasser für den Bach unterhalb?
Und wenn Du solche Objekte veränderst, kümmere dich bitte auch um beteiligte Relationen!

Wenn Du vermeintliche Flächenpolygone veränderst oder löschst, kümmeer Dich bitte auch konsequent um betroffene Relationen (Multipolygone):

https://tools.geofabrik.de/osmi/?view=areas&lon=9.49548&lat=51.85633&zoom=15&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

https://tools.geofabrik.de/osmi/?view=areas&lon=9.58912&lat=51.90560&zoom=17&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

Gehören tatsächlich alle inner-Flächen nicht zum zum Feuerwehrzentrum?
relation/16997967

Was bezweckst Du mit all diesen kaputten Multipolygonen?
https://tools.geofabrik.de/osmi/?view=areas&lon=8.21923&lat=53.09540&zoom=12&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
https://tools.geofabrik.de/osmi/?view=areas&lon=8.69685&lat=52.79920&zoom=15&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 bei der Löschung von Wegen sorgfältiger vorgehen. Sie können Bestandteil einer Relation z.B. eines Multipolygons sein. Ihre Löschung ohne sich um ihren Kontext zu kümmern, hinterlässt dann eine sinnentleerte Relation.
Beispiel: Löschung des Weges 916937095 https://osm.mapki.com/history/way/916937095 hinterlässt das kaputte Multipolygon relation/12442517#map=15/49.0784/12.1443
Ausserdem geht durch die Löschung neben der Historie des Weges auch die sämtlicher beteiligter Knoten verloren. Das entspricht nicht guter fachlicher Praxis: osm.wiki/DE:Good_practice#Erhalte_die_Chronik%E2%86%99
Das kann man vermeiden, indem man einzelne Flächen aus dem bestehenden äussern Polygon abtrennt.

Für Routenrelationen bitte bestehende Wege verwenden, nicht einfach neue Wege drüberbügeln.
https://tools.geofabrik.de/osmi/?view=routing&lon=9.66256&lat=51.11373&zoom=16&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=duplicated_edges%2Cduplicated_edges%2Cduplicated_edges_areas

Und was jetzt? Reparieren?
https://tools.geofabrik.de/osmi/?view=areas&lon=13.02115&lat=47.30151&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

Please finish properly:
https://tools.geofabrik.de/osmi/?view=areas&lon=13.65168&lat=46.44692&zoom=12&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

Abgesehn davon, dass es (https://tools.geofabrik.de/osmi/?view=areas&lon=8.17682&lat=50.67839&zoom=15&baselayer=Geofabrik%20Standard&opacity=0.95&overlays=role_should_be_outer%2Cways) kein gültiges Multipolygon ist, was soll das darstellen? relation/16507573