ERROR 1005: Can't create table 'intelischool.facultyclasses' (errno: 121) please some body help me the statements are
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CREATE  TABLE `intelischool`.`facultyclasses` (

  `id` VARCHAR(45) NOT NULL ,

  `class` VARCHAR(45) NOT NULL ,

  `subject` VARCHAR(45) NOT NULL ,

  `year` VARCHAR(45) NOT NULL ,

  `section` VARCHAR(45) NOT NULL ,

  PRIMARY KEY (`id`, `section`, `year`, `subject`, `class`) ,

  INDEX `id` (`id` ASC) ,

  CONSTRAINT `id`

    FOREIGN KEY (`id` )

    REFERENCES `intelischool`.`faculty` (`id` )

    ON DELETE NO ACTION

    ON UPDATE NO ACTION)

