Hi,
I am using Create sub-task post function on transition "eLearning Done".
Sub-task is getting created. But again when I try to update something and again click on "eLearning Done" transition, the second subtask is getting created automatically.
I only want sub-task should be created only once , when transition "eLearning Done" is triggered for the First time and not every time.
Please help me, what condition to be added for this.

Thank in advance!