Otrzymałem ten błąd podczas tworzenia tabeli: ograniczenie klucza obcego jest niepoprawnie utworzone ???

<code>{create table comment(
Comment_ID int UNSIGNED AUTO_INCREMENT not null,
User_1 varchar(50) not null,
Note_ID int(11) UNSIGNED not null,
PRIMARY key(Comment_ID),
  CONSTRAINT `fk_1` FOREIGN KEY (`User_1`) REFERENCES `user` (`Dev_ID`),
  CONSTRAINT `fk_2` FOREIGN KEY (`User_2`) REFERENCES `user` (`Dev_ID`),
  CONSTRAINT `fk_3` FOREIGN KEY (`Note_ID`) REFERENCES `note`(`Note_ID`)
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
}
</code>

jest dobrze, gdy usuwam fk_3
ten mój stół do notatek

<code>{ 
CREATE TABLE `note` (
 `Dev_ID` varchar(50) NOT NULL,
  `Note_ID` int(11) UNSIGNED NOT NULL,
  `Title` varchar(200) NOT NULL,
  `Time` datetime NOT NULL,
  `Mood` int(11) NOT NULL,
  `Body` varchar(3000) NOT NULL,
  `Visible` tinyint(1) NOT NULL DEFAULT '1',
  `Share` tinyint(1) NOT NULL DEFAULT '0',
  `Update` tinyint(1) NOT NULL DEFAULT '0',
  PRIMARY KEY (`Dev_ID`,`Note_ID`),
  CONSTRAINT `fk_note_user` FOREIGN KEY (`Dev_ID`) REFERENCES `user` (`Dev_ID`) ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8
}
</code>

Dzięki za pomoc!