Vypisuje chybu aká je chyba?

Chyba
SQL dopyt:

CREATE TABLE `adresy_url` (

`id_adresy` SMALLINT( 4 ) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY ,
`id_nazvu` SMALLINT( 4 ) UNSIGNED NOT NULL ,
`id_typu` TINYINT( 3 ) UNSIGNED NOT NULL ,
`shvaleno` CHAR( 1 ) NOT NULL DEFAULT 'N',
`datum_prijeti` TIMESTAMP( 14 ) NOT NULL ,
PRIMARY KEY ( `id_nazvu` , `shvaleno` )
) ENGINE = MYISAM

MySQL hlási:

#1068 - Multiple primary key defined