There are configurations under Warehouse for managing the incoming and outgoing shipments which provide different steps for receiving and delivering the prodcuts, whenever I am trying to modify those configuration, system throws the following error "IndexError: list index out of range".

This is specifically happening while I am trying to change the "outgoing shipment" configuration. My current configuration is 3-steps (pick + pack + ship) and I am trying to change to (Ship only), and it throws an error in doing this.

Does any one know what could be the problem? Am I missing any configuration?