TYPO3 Core

I tried to generate a site configuration with the Backend module.

I only need German as a language and no English. So I deleted English and added German.

The Site Configuration Module was writting the following Site Configuration:

base: 'https://example.ddev.site'
languages:
  -
    title: Deutsch
    enabled: true
    languageId: 1
    base: /
    locale: de_DE
    navigationTitle: ''
    flag: global
    websiteTitle: ''
rootPageId: 1
websiteTitle: 'Beispiel'

From here there was not getting back to a valid siteconfiguration by using the Backend Module.