Dear ALL,
being struggling to code an Jira automation rule which triggers when a sub-task is created and as action it should copy a specific field value (of the sub-task) to the equivalent field of its Epic (so, being the grand-parent of the sub-task).
Could you please help me out with the syntax?
I have created a smart variable called EpicKey as {{issue.parent.epiclink}} but the automation returns nothing.

I use Jira Data Center version 9.12.16.
Thanks in advance, Vincenzo.