Should be a way to uncancel an order

We have had instances in lab, radiology, nursing, etc. where an order has been cancelled by mistake. There should be some way to uncancel an order. We had a situation today where we had a radiology order that was cancelled by mistake, and the report was on it already through an interface. Now we have to get rid of that report, enter a new order, fix it in the PACS, and have it resent through the interface. Mistakes happen, and there should be an easy way to correct them.