1. In the CS, go to the status dropdown button.
2. If the status is In execution or executed, CS must be disconnected from the SO (see how to handle in item 4 on the list)
3. If the status is New or Open, choose status CANCEL and save.
4. For CS linked to SO, go to the SO customer shipments tab. Untick the bind checkbox.
5. Go back to the CS, go to the dropdown button, choose CANCEL and save.