Please see the en.WP pages WP:BABY and WP:BATHWATER.
The first points the essay WP:Baby_and_bathwater which contains the following tag:
{{Essay|interprets=[[Wikipedia:Editing policy]] and the [[Wikipedia:Core content policies]]|WP:BABY|WP:BATHWATER}}
As you can see the essay lists two shortcuts: BABY and BATHWATER.
The second points to a section of another essay, WP:Overzealous deletion. That section includes the tag:
{{shortcut|WP:BATHWATER}}
When you click on BATHWATER it takes you to this second page.
(Sidenote: The {details} tag in the latter article section was added by me today)
It seems that the shortcut tag/section was created after the essay tag/page but apparently no conflict warning was given that there was already a page using that shortcut. I am not sure if this is a case of most recent tag wins or if it is a case of shortcut has priority over essay but a scan needs to be done to see if there are any other conflicts and then a the bug needs to be fixed.