mysql errno:150 “A restrição de chave estrangeira está formada incorretamente” - MariaDB

DROP TABLE message_map;
CREATE TABLE message_map (
  message_from varchar(15) NOT NULL,
  message_id varchar(15) NOT NULL,
  message_to varchar(15) NOT NULL,
  message_status bit(1) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

ALTER TABLE message_map
    ADD PRIMARY KEY (message_from,message_id,message_to),
    ADD KEY FK_ij6tystusydqijqp8lgoigo1c (message_id);

ALTER TABLE message_map 
    ADD CONSTRAINT FK_MSG_MAP_USER
    FOREIGN KEY (message_from)
        REFERENCES user (USER_ID)
            ON DELETE CASCADE
            ON UPDATE CASCADE,
    ADD CONSTRAINT FK_MSG_MAP_USER_TO
    FOREIGN KEY (message_to)
        REFERENCES user (USER_ID)
            ON DELETE CASCADE
            ON UPDATE CASCADE;