Проблема с комментариями

MySQL error in file: /engine/classes/comments.class.php at line 86
Error Number: 1052
The Error returned was:
Column ip in field list is ambiguous
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, name, dle_users.email, news_num, comm_num, user_group, lastdate, reg_date, signature, foto, fullname, land, icq, xfields FROM dle_comments LEFT JOIN dle_users ON dle_comments.user_id=dle_users.user_id WHERE dle_comments.post_id = 8 ORDER BY date ASC LIMIT 0,30