If [Ins] is pressed on a field for which a Valid Entries List is not available, the following message is displayed: "A Valid Entries List could not be found for this field. (File= the path and filename for the Valid Entries List file is displayed here). Would you like to create one?".
Select [Yes] to open the Database List Editor to create the Valid Entries List File, add field values to the list, and save the list.
Select [No] or [Cancel] to continue without creating a Valid Entries List.
See:
Database List Editor Contents