Confused about multiple dashboards

According to the docs any page you add to

App/Filament/Pages

App/Filament/Pages

that extends

Filament\Pages\Dashboard

Filament\Pages\Dashboard

will be available as a new dashboard. However, whatever I add breaks the admin with

Route [filament.admin.pages.dashboard-one] not defined.

Route [filament.admin.pages.dashboard-one] not defined.

. I tried adding the pages explicitly to

$panel->pages()

$panel->pages()

but the error remains. What am I missing?