Filter unique values in a custom object on a DCL field

Summary:

A custom object has one of the fields as DCL(Dynamic Choice List). This DCL is in turn dependent on a custom object (LOV custom object) which will have duplicate values. But the base custom object DCL field which lists the values for user selection should only show unique values from the LOV custom object

Content (required):

A custom object has one of the fields as DCL(Dynamic Choice List). This DCL is in turn dependent on a custom object (LOV custom object) which will have duplicate values. But the base custom object DCL field which lists the values for user selection should show only unique values from the LOV custom object