Flow schedule deleted by Mistake

Hi,

We deleted a flow schedule for a star item by mistake and it is not showing as an unscheduled item again in the line scheduling workbench.

Is there anyway, we can bring the star item back to the line scheduling workbench as a unscheduled item.

Here is the scenario of the order.

Star item is generated for a qty of 2.

It was scheduled and 2 schedule numbers were created. For one of the schedule number, WOLC was completed and also the item was shipped on the sales order.

For the remaining 1 qty, a back-order is generated on the sales order. But, since the schedule was deleted, it is not showing up in the unscheduled orders form again.