use provisioning;
set autocommit=0;

set @pid = 0;
select id into @pid from voip_preferences where attribute = "lock";

update voip_preferences set data_type = "string", description="See \"lock_voip_account_subscriber\" for a list of possible values. A lock value of \"none\" will not be returned to the caller. Read-only setting." where id = @pid;

delete from voip_preferences_enum where preference_id = @pid;

commit;