#1 error schema_mysql.sql

[hermawan]

i have error ini mysql
ERROR 1005 (HY000) at line 65 in file: 'schema_mysql.sql': Can't create table inventory.document (errno: 150 "Foreign key constraint is incorrectly formed")
ERROR 1005 (HY000) at line 79 in file: 'schema_mysql.sql': Can't create table inventory.document_product (errno: 150 "Foreign key constraint is incorrectly formed")