SET sql_log_bin=0;
USE billing;

UPDATE
             lnp_numbers a
  CROSS JOIN lnp_numbers b
SET a.number = CONCAT('dupe--',a.number,'--',a.id)
WHERE
  a.id < b.id
  and (a.number = b.number and a.lnp_provider_id = b.lnp_provider_id);

LOCK TABLES lnp_numbers WRITE, lnp_providers WRITE;

ALTER TABLE lnp_numbers DROP FOREIGN KEY `l_n_lnpproid_ref`;
CREATE UNIQUE INDEX l_n_lnpproidnumber_idx ON lnp_numbers (lnp_provider_id,number);
ALTER TABLE lnp_numbers ADD CONSTRAINT l_n_lnpproid_ref FOREIGN KEY (lnp_provider_id) REFERENCES lnp_providers (id) ON DELETE RESTRICT ON UPDATE CASCADE;

UNLOCK TABLES;