MySql Foreign Key is incorrectly formed - mysql

Question

I am using xampp (localhost) and mysql to make a database for a project but i have a problem with foreign keys and i cant find my mistake when i am trying to create a student enrolment table this is the message i am getting:
#1005 - Can't create table X.studentenrolment (errno: 150 "Foreign key constraint is incorrectly formed")
My Tables Code:
CREATE TABLE LOGINFO (
STUDENTNUMBER NUMERIC(9) NOT NULL,
PASS CHAR(12),
CONSTRAINT LOGINFO_PRIMARY_KEY PRIMARY KEY (STUDENTNUMBER));
CREATE TABLE LEADERS(
MODULESLEADER CHAR(16) NOT NULL,
LEADERSOFFICE CHAR(16) ,
LEADERSEMAIL CHAR(16) ,
LEADERSPHONE numeric(4),
CONSTRAINT LEADERS_PRIMARY_KEY PRIMARY KEY (MODULESLEADER));
CREATE TABLE MODULES(
MODULESLEADER CHAR(16) NOT NULL,
MODULECODE CHAR(6) NOT NULL ,
MODULEDESCRIPTION CHAR(16) ,
LECTURESLOT CHAR (16),
LECTUREROOM CHAR(4) ,
CONSTRAINT MODULES_FOREIGN_KEY FOREIGN KEY (MODULESLEADER) REFERENCES LEADERS (MODULESLEADER),
CONSTRAINT MODULES_PRIMARY_KEY PRIMARY KEY (MODULESLEADER,MODULECODE));
CREATE TABLE STUDENTENROLMENT(
STUDENTNUMBER NUMERIC(9) NOT NULL,
MODULECODE CHAR(6) NOT NULL ,
CONSTRAINT STUDENTENROLMENT_FOREIGN_KEY FOREIGN KEY (STUDENTNUMBER) REFERENCES LEADERS (STUDENTNUMBER),
CONSTRAINT STUDENTENROLMENT_FOREIGN_KEY FOREIGN KEY (MODULECODE) REFERENCES MODULES (MODULECODE),
CONSTRAINT STUDENTENROLMENT_PRIMARY_KEY PRIMARY KEY (STUDENTNUMBER, MODULECODE));
I am trying hours to find what's the mistake with my syntax but i cant find it i've tried many other ways like:
CONSTRAINT STUDENTENROLMENT2_FOREIGN_KEY FOREIGN KEY (MODULECODE) REFERENCES MODULES (MODULECODE)
Thank You in advance!

Answer 1

I think that FOREIGN KEY (STUDENTNUMBER) should specify to LOGINFO table.
Maybe this question can help
It seems that this code doesn't cause an error:
CREATE TABLE LOGINFO (
STUDENTNUMBER NUMERIC(9) NOT NULL,
PASS CHAR(12),
CONSTRAINT LOGINFO_PRIMARY_KEY PRIMARY KEY (STUDENTNUMBER));
CREATE TABLE LEADERS(
MODULESLEADER CHAR(16) CHARACTER SET utf8 NOT NULL,
LEADERSOFFICE CHAR(16) ,
LEADERSEMAIL CHAR(16) ,
LEADERSPHONE numeric(4),
CONSTRAINT LEADERS_PRIMARY_KEY PRIMARY KEY (MODULESLEADER));
CREATE TABLE MODULES(
MODULESLEADER CHAR(16) CHARACTER SET utf8 NOT NULL,
MODULECODE CHAR(6) CHARACTER SET utf8 NOT NULL ,
MODULEDESCRIPTION CHAR(16) ,
LECTURESLOT CHAR (16),
LECTUREROOM CHAR(4) ,
CONSTRAINT MODULES_FOREIGN_KEY FOREIGN KEY (MODULESLEADER) REFERENCES LEADERS (MODULESLEADER),
CONSTRAINT MODULES_PRIMARY_KEY PRIMARY KEY (MODULECODE, MODULESLEADER));
CREATE TABLE STUDENTENROLMENT
(
STUDENTNUMBER NUMERIC(9) NOT NULL,
MODULECODE CHAR(6) CHARACTER SET utf8 NOT NULL,
CONSTRAINT STUDENTENROLMENT_MODULES_MODULECODE_fk FOREIGN KEY (MODULECODE) REFERENCES MODULES (MODULECODE)
,CONSTRAINT STUDENTENROLMENT_LOGINFO_STUDENTNUMBER_fk FOREIGN KEY (STUDENTNUMBER) REFERENCES LOGINFO (STUDENTNUMBER),
CONSTRAINT STUDENTENROLMENT_PRIMARY_KEY PRIMARY KEY (STUDENTNUMBER, MODULECODE)
);