System job, error on my SQL

Hi, I have the error on my sql:

I download: [Release] Jobs System v2.1 and Paycheck v2.1

The error say:


Request SQL :

CREATE TABLE jobs (
job_id int(11) NOT NULL,
job_name varchar(40) NOT NULL,
salary int(11) NOT NULL DEFAULT ‘500’
) ENGINE=InnoDB DEFAULT CHARSET=utf8

MySQL say: Documentation
#1215 - Unable to add external index constraints


He don’t creat a table jobs in gta5_gamemode_essential, but he creat the table job in users.

Thank For Help.