With the DBKEY SCOPE IS FINISH clause, Oracle Rdb cannot reuse the
    dbkey (to store another record) until the user who erased the
    original record detaches from the database (by using the FINISH
    statement).

    Further, the DBKEY SCOPE FINISH clause specifies that the dbkey
    of each record used is guaranteed not to change until this user
    detaches from the database(usually, with FINISH).