In "Merge Zone" (November), the database diagram contained an error. The correct diagram has an additional table, field_user, that is used for the dynamic filtering criteria. The current field_user table in the diagram should be called field_user/events and represents the many-to-many relationship between field users and events. So the field_ user/events and field_user tables are joined on their respective rep_id columns; field_user/events and events are joined on each table's event_id column. In other words, event_id in field_user/events is a foreign key whose matching primary key is event_id in events; rep_id in field_user/events is the foreign key whose matching primary key is rep_id in field_user.