I am trying to create an automation rule which automatically takes the time logged on a Sub-task and moves it to the parent issue.
So far, I've managed to achieve everything I wanted apart from removing that particular instance of logged work. I don't mind if I do this through changing the time spent on the issue or delete the log entry itself, I'm just trying to achieve this regardless of the means.
I've attached a screenshot of the Automation. I've tried multiple approaches on the Advanced Issue field edit, but nothing's worked so far. It might just boil down to me not being very well versed in the ways of JSON language, but I am hoping to find some assistance here. All suggestions welcome! 
