I have searched the community threads on this issue, but it seems that the problem that I am facing has not been answered to my specific situation, so starting a new question.
I am trying to set up an automation that will sum up the original estimate of stories to their linked Epic (Parent). I have set up the rule, and it notes that when run, it is a success, but no changes are apparent. Not sure what I am doing wrong here; I may be going crazy!
Here is my rule

Hoping the community can help me figure out the issue, as I am sure its something small that I am overlooking.
Note: our original estimate is set to hours so using the divide by 3600