To disable lookup values without changing the database table
1.
Click Settings > Marketing Operations Settings.
2.
In the Administrative Settings screen, click Template Configuration (located under Other Options).
3.
Click Forms.
The Forms Definitions list page appears.
4.
Click Manage for the form that contains the lookup values you want to edit.
The Manage Lookup Values dialog box appears.
5.
Clear the Enabled check box for any value that you want to disable.
Clicking the checkbox toggles the setting: values that contain a check are enabled, and values that are not checked are disabled.
6.