MySQL error in file: /engine/init.php at line 62

Error Number: 1064

The Error returned was:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'klass-zhnec-revelation-online'' at line 1

SQL query:

SELECT id FROM dle_post WHERE alt_name=''klass-zhnec-revelation-online'