The tableBASE administrator controls the permissions for entering rows with duplicate keys. This is done by allowing duplicates when defining the View for this table and the menu selection used to access this screen.
If both conditions prevail, the Duplicate Keys Allowed field will be present on the Identify Table screen (see Figure 129) and will contain the default setting.
If the default setting is Y, you may override it and prevent rows with duplicate keys to be added to the table by changing the setting to N. If the default setting is N, you may change it to Y.