I found the solution.
The cards are based on card drafts by Thomas Kahn, here known as user Basiskarten.
The solution can be found here:
[link blocked by forum] → look for the user “Basiskarten” here. The link to his website (basiskarten(dot)de) is there or you can just add the point to the link I just wrote down.
You will find the necessary info if you go to the header “Kontakt”, then click “Schreibt mir” and then “Lest dazu bitte diesen Blogbeitrag.”
I downloaded the Butler-Addon and it updated my Rechtsfrage-cards from version 1.13 to 2.15 (or similar). Seems like my version was pretty old, since I started my decks around 2014-2016.
→ Youtube Video explanation for fix
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→ Install site Anki Butler
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→ If: Multiple old versions
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