In step 4 "Vehicles / Machines", select the vehicle / machine you wish to deregister.
You must ensure that, beforehand, the vehicle / machine is unassigned from the coordination and appears in the lower table "External company's vehicles / machines not associated with the coordination". If you don't remember how to do this, [we'll explain how](https://scribehow.com/viewer/Unassign_vehiclesmachines_from_a_coordination__njCo_9wjTvylaYZDwEoufw?referrer=documents)."