I have epics that are linked to an Initiative and I am trying to set up an automation for when an Epic is linked to an Initiative, it'll grab the Initiative's key/summary into the "Initiative Key and Name" custom field into the Epic. However, I keep getting the error below:

No Actions Performed:
Source issue (the main branch of the rule will execute for this issue and you can access it via {{issue}}):
Destination issue (to perform actions on this issue use a 'Related branch', you can also access it via {{destinationIssue}}):
INITIATIVE-123
Is the set-up or smart values incorrect? Appreciate the help.