Academy Challenge Links in EN are still mandatory

[hello-kathi]

URL: https://liqd.net/admin/pages/add/academy/academychallengepage/3/#tab-english
user:
expected behaviour: Admin can creates Challenge and don't has to fill in english language or academy links
behaviour: You have to fill in academy links to save and publish
important screensize:
device & browser:
Comment/Question:

Screenshot?