is it possible to display dialogbox when sub iteration end date is greater than Parent iteration end date?

In the Timelines configuration, when I create a sub-Iteration with a defined start date, within the Iteration (Parent), if that date is out of the Iteration date (The parent iteration date), there is no displayed warning message. And in addition, when I save the configurations, it works.

Request: Please could you display a dialog box warning message when the sub-iteration ‘dates are out of the Iteration ‘dates?