Hi everyone,
I am trying to add a customfield ("Target start", of type date) to a subtask which should be calculated based on the Parent issue "Target start".
So...let's say:
Task A -> "Target start" = 24/04/2023 [ THIS IS THE INFORMATION I HAVE ALREADY ]
Subtask a -> "Target start" = Task A "Target start" - 3 weeks [ THIS IS WHAT I NEED ]
I created an automation as I have multiple Tasks and therefore multiple Subtasks that require this adjustments.
The automation runs smoothly but I am having trouble in parsing the Parent date into the subtask.


I am not sure how should I complete the json part to complete this properly. Can someone suggest me other ways?
Thanks!