Not allowing duplicate labels

Looking for a way to limit the label choices to 1 per label. This specific application would be for a Trailer Yard Management Board. I.E. If the trailer spot “1A” label is chosen by one user and then another user goes to try to chose it, it is not selectable until the other entry using “1A” releases it/changes to something else. Chatted with MDC about this idea…love the platform and hoping you can make it happen!

For clarity…title should be: Wanting to not allow duplicate labels in the same status to be used at the same time.