The booking gets the status Stopped. By default, only stopped bookings that have measured impressions stay visible in the interface. If Adhese measured impressions, the booking gets the status Stopped (the status indicator is shown as a black circle in the Running status). Bookings that have not measured impressions are hidden by default. See for an example the screenshot below. No stopped bookings (with no impressions measured) are visible.
When you hit the Show hidden bookings button, stopped bookings (with no impressions measured) become visible: