hi WhiskyMacK, please follow the OSM wiki:
osm.wiki/Key:wikipedia
wikipedia=en:Name, not wikipedia:en=http.. !
Thanks, Alex

hi Infodisiac, please follow the OSM-wiki.
wikipedia="en:Name" not wikipedia:en="http.." and only 1 wikipedia per object, see osm.wiki/Key:wikipedia
Thanks, Alex

comment missing: fix wikipedia format

not wikipedia=http...

Hi RobertR, please follow the OSM wiki. wikipedia="lang:Name".
osm.wiki/Key:wikipedia
Thanks, Alex

Hi mapper999, why do you create problem-keys ( k = "@Sammelmütze" ) ?

https://taginfo.openstreetmap.org/reports/characters_in_keys#problem

Alex

Hi Ben97, what do you mean with tag "J"="311" ? As it is unique, I assume it is a typo? regards, Alex

Hi dgitto, what do you mean with tag "J"="311" ? As it is unique, I assume it is a typo? KR, Alex

Hi Andresek59, bitte folge dem OSM-wiki.
wikipedia="de:Name", nichr "http..".
Danke, Alex

Details:
osm.wiki/Key:wikipedia#Examples

mir unbekannt. aber hier ist keine Meeresspiegelhöhe. VG, Alex

Hi realdkw, bitte schreibe wikipedia="de:Artikel" nicht "http,,,".
Danke Alex

Details siehe osm.wiki/DE:Key:wikipedia?uselang=de#Bevorzugtes_Tagging

Hi iMostar, please do not add tags like: (*=Unknown). Thanks, Alex

Hi Tamerdab, please follow the OSM-wiki.
wikipedia="en:Article" (not "http..").
Thanks, Alex

details here: osm.wiki/Key:wikipedia

Hi Schönberger, bitte folge dem OSM-wiki, wikipedia="de:Artikel" (nicht "http..").
Das Datenformat ist dann einheitlicher.
Danke, Alex

osm.wiki/DE:Key:wikipedia

Hi PASTA777, bitte folge dem OSM-wiki, wikipedia="de:Artikel" (nicht "http..").
Das Datenformat sind dann einheitlich.
Danke, Alex

osm.wiki/DE:Key:wikipedia

I changed the bad key="<" to note= to avoid problems with problematic keys, Alex

Hi Teemu Piippo, you added a problematic key: www.openstreetmap.org/way/507370962/history
Please fix this again.
Thanks, Alex

Danke für den Hinweis. Erledigt.

would it be enough if the relation gets natural=bay and (optional) water= removed ?
Because removing coastline could (I'm not sure) hide it in rendering for zoom-level 0..5 ?
Are there no other valid/correct Haffs (lagoon without no salt-water) that could guide us here?

I think something is needed. I dont know what is the best (correct solution).
Perhaps we should make the relation: natural=bay (and remove the node for it).
Because this kid of closed bay (german=Haff) is a clearly bordered water-object like a lake, not like an half-open bay.
KR, Alexander