MySQL error in file: /engine/classes/comments.class.php at line 753

Error Number: 1054

The Error returned was:
Unknown column 'dle_comments.vote_num' in 'field list'

SQL query:

SELECT dle_comments.id, post_id, dle_comments.user_id, date, autor as gast_name, dle_comments.email as gast_email, text, ip, is_register, dle_comments.rating, dle_comments.vote_num, dle_comments.parent, name, dle_users.email, news_num, comm_num, user_group, lastdate, reg_date, signature, foto, fullname, land, xfields FROM dle_comments LEFT JOIN dle_users ON dle_comments.user_id=dle_users.user_id WHERE dle_comments.post_id = '781' AND dle_comments.approve=1 ORDER BY dle_comments.id DESC