Thank you for your reply.
I have try but that doesn't work. Hence, I will leave it as default.
I have another issue. I have created a workflow in SPD that started automatically every time a new item is created. Therefore, every time I input multiple items in the repeating sections, it will create multiple items and start a workflow for each of the item. However, I want the workflow to start only once for all these item.
My question is: "Is there an way that I can start a workflow only one times when submitting the form with repeating sections?"
Thank you!