drop-down list with available items only

[barbarascristin]

In my app, I have a table named 'Agendas Disponíveis' that is categorized as 'read-only'. It serves as the data source for a dropdown list in the main table 'Input Dados'. The user selects a value from this list, and I would like that once they make a selection, that option is no longer available in the dropdown for their next response."