Prevent the user from confirming a shipment with lines in "Ready to release" or "Barckordered" statu

Summary:

Prevent the user from confirming a shipment with lines in "Ready to release" or "Barckordered" status

Content (please ensure you mask any confidential information):

Is it possible to prevent users from confirming a shipment when the shipping lines are in the "Ready to release" or "Backordered" statuses?
We're having a lot of problems because users confirm shipments with lines in this states and think the shipment is confirmed because it's closed. The shipment changes to the "Closed" state, but the lines remain pending shipment.

How can we avoid this confusion for the user?

If the shipment confirmation is done from the shipment lines screen, the application doesn't allow it to continue.