After event: Set stock level of tickets to 0

We use the event ticketing add on and it works well. However a problem I just discovered is that after an event passes and it is taken off the calendar etc, it doesn't change the stock levels. The problem here is we also link from WooCommerce to Facebook Shop, so on facebook it looks like that ticket is still available, and we are running ads on events that have already passed.

Could you make it so that when an event passes its stock levels are automatically set to 0?