The situation is that there will be a transect that has multiple stopping points to listen for birds. So the initial form will collect transect information, then with a repeat section to collect information at each individual stop. I'm hoping to see if there is functionality that will not allow users of the survey to accidentally duplicate the same stop point. Each seperate transect has 10 stopping points (1, 2, 3, 4, etc.). After conducting a stop and proceeding to the next repeat can I restrict the option to not allow the use of the same stop point? It's currently set up as a select_one field.