Hi community,
I am working on some butler rules. I would like that when a due date is set on a card, this due date is copied in the description of the linked card.
I have created the following rule for this purpose:

The text "Cardduedate:" is included in the description of the linked card, but not the due date.
What am I doing wrong here? Or should I use another variable for this?
Thank you very much!