Mysql errno 150. I do not understand what is missing - mysql

Question

The provinces table
CREATE TABLE IF NOT EXISTS `shmarket`.`PROVINCES` (
`provinceId` VARCHAR(6) NOT NULL,
`name` VARCHAR(45) NOT NULL,
PRIMARY KEY (`provinceId`))
ENGINE = InnoDB
DEFAULT CHARACTER SET = utf8
COLLATE = utf8_unicode_ci;
The cities table
Table `shmarket`.`CITIES`
CREATE TABLE IF NOT EXISTS `shmarket`.`CITIES` (
`cityId` VARCHAR(6) NOT NULL,
`name` VARCHAR(45) NOT NULL,
`PROVINCES_provinceId` VARCHAR(6) NOT NULL,
PRIMARY KEY (`cityId`),
INDEX `fk_CITIES_PROVINCES1_idx` (`PROVINCES_provinceId` ASC),
CONSTRAINT `fk_CITIES_PROVINCES1`
FOREIGN KEY (`PROVINCES_provinceId`)
REFERENCES `shmarket`.`PROVINCES` (`provinceId`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB
DEFAULT CHARACTER SET = utf8
COLLATE = utf8_unicode_ci;
-----------------------------------------------------
Table `shmarket`.`USERS`
-----------------------------------------------------
CREATE TABLE IF NOT EXISTS `shmarket`.`USERS` (
`userId` INT NOT NULL AUTO_INCREMENT,
`name` VARCHAR(45) NOT NULL,
`surname` VARCHAR(45) NOT NULL,
`email` VARCHAR(45) NOT NULL,
`password` VARCHAR(45) NOT NULL,
`registryDate` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
`role` VARCHAR(6) NOT NULL,
`CITIES_cityId` VARCHAR(6) NOT NULL,
PRIMARY KEY (`userId`),
UNIQUE INDEX `email_UNIQUE` (`email` ASC),
INDEX `fk_USERS_CITIES1_idx` (`CITIES_cityId` ASC),
CONSTRAINT `fk_USERS_CITIES1`
FOREIGN KEY (`CITIES_cityId`)
REFERENCES `shmarket`.`CITIES` (`cityId`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
When i create the users table mysql shows errno 150. I checked the code few times but its not working. I generated this code with mysql workbench and also is failing.

Answer 1

If you're using the InnoDB engine, the ON DELETE SET DEFAULT is your problem. Here's an excerpt from the manual:
While SET DEFAULT is allowed by the MySQL Server, it is rejected as invalid by InnoDB. CREATE TABLE and ALTER TABLE statements using this clause are not allowed for InnoDB tables.
You can use ON DELETE CASCADE or ON DELETE SET NULL, but not ON DELETE SET DEFAULT. There's more information here.
This error also occurs if you are relating columns of different types, eg. int in the source table and BigInt in the destination table.
You can run
SHOW ENGINE INNODB STATUS