612771 - RHDS 8.1/389 v1.2.5 accepts 2 identical entries with
     different DN formats
    
    https://bugzilla.redhat.com/show_bug.cgi?id=612771
    
    Fix Description:
    When newly creating an ancestorid index file, instead of
    opening the index file with DB_TRUNCATE option, delete
    the file then create it.