Error number 150 in the Foreign Key - mysql

Question

I intend to create a table with two columns (bus_id, bus_passengers). The bus_id is going to be the primary key and will be the foreign key from another created table, which is called "beacap_locationLog", column node_id.
This is the code I wrote (mySQL):
CREATE TABLE Bus(
bus_id INT (10) UNSIGNED NOT NULL,
bus_passengers INT,
PRIMARY KEY (bus_id),
FOREIGN KEY (bus_id) REFERENCES beacap_locationLog(node_id)
);
It's giving me this error:
#1005 - Can't create table 'pei.Bus' (errno: 150)
I don't know what the problem is.

Answer 1

Cannot have the primary + foreign key on the same ! column with the same name
Shoul be like this !
-see i have added a new column !!
CREATE TABLE Bus(
bus_id INT (10) UNSIGNED NOT NULL,
bus_passengers INT,
node_id_fk int,
PRIMARY KEY (bus_id),
FOREIGN KEY (node_id_fk) REFERENCES beacap_locationLog(node_id)
);
also the node_id_fk and node_id must have the same type !
Ok , see full example :
mysql> create table beacap_locationLog(
-> node_id int
-> );
Query OK, 0 rows affected (0.26 sec)
mysql> CREATE TABLE Bus(
-> bus_id INT (10) UNSIGNED NOT NULL,
-> bus_passengers INT,
-> node_id_fk int,
-> PRIMARY KEY (bus_id),
-> FOREIGN KEY (node_id_fk) REFERENCES beacap_locationLog(node_id)
-> );
Query OK, 0 rows affected (0.03 sec)
mysql> desc beacap_locationLog;
+---------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+---------+------+-----+---------+-------+
| node_id | int(11) | YES | | NULL | |
+---------+---------+------+-----+---------+-------+
1 row in set (0.00 sec)
mysql> desc Bus;
+----------------+------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------------+------------------+------+-----+---------+-------+
| bus_id | int(10) unsigned | NO | PRI | NULL | |
| bus_passengers | int(11) | YES | | NULL | |
| node_id_fk | int(11) | YES | MUL | NULL | |
+----------------+------------------+------+-----+---------+-------+
3 rows in set (0.00 sec)
mysql>
TBL Bus definition
mysql> show create table Bus\G
Table: Bus
Create Table: CREATE TABLE Bus (
bus_id int(10) unsigned NOT NULL,
bus_passengers int(11) default NULL,
node_id_fk int(11) default NULL,
PRIMARY KEY (bus_id),
KEY node_id_fk (node_id_fk)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
1 row in set (0.01 sec)