USE provisioning;

CREATE TABLE voip_preferences_enum_old (
    preference_id   int(11) unsigned,
    label           varchar(128),
    value           varchar(128),
    primary key (preference_id, value),
    foreign key (preference_id) references voip_preferences (id) 
) ENGINE=InnoDB;

INSERT INTO voip_preferences_enum_old (preference_id, label, value)
SELECT preference_id, label, value FROM voip_preferences_enum;

DROP TABLE voip_preferences_enum;
ALTER TABLE voip_preferences_enum_old RENAME TO voip_preferences_enum;