Hi,

Here's a present OSM Inspector areas view of the edits you did here around the river area. All the light/dark blue, orange, green is incorrectly oulined, same multipolygon relation passing a area line twice or has been assigned the wrong inner or outer role.

https://tools.geofabrik.de/osmi/?view=areas&lon=6.31500&lat=48.59486&zoom=12&baselayer=Geofabrik%20Standard&opacity=0.65&overlays=duplicate_segment%2Cway_in_multiple_rings%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways

I suggest you carefully reread the multipolygon wiki pages. If you need help or have questions on specific problem point let me know.

ciao