Baby НН — Ошибка

SQL error: Unknown column 'm' in 'where clause' (Code: 1054)

SELECT
  comments.*,
  comments.text_f AS text,
  UNIX_TIMESTAMP(comments.dateCreate) AS dateCreate_tStamp,
  UNIX_TIMESTAMP(comments.dateUpdate) AS dateUpdate_tStamp,
  users.login,
  users.name AS userName,
  users2.login AS ansLogin,
  pages.path,
  pages.mysite,
  pages.title AS pageTitle,
  dd_titles.title AS itemTitle
FROM comments_srt
  INNER JOIN comments_active ON
    comments_srt.parentId=comments_active.parentId AND
    comments_srt.id2=comments_active.id2
  INNER JOIN comments ON comments_srt.id=comments.id
  LEFT JOIN users AS users ON comments.userId = users.id
  LEFT JOIN users AS users2 ON comments.ansUserId = users2.id
  LEFT JOIN pages ON comments.parentId = pages.id
  LEFT JOIN dd_titles ON comments.parentId = dd_titles.pageId AND
                         comments.id2 = dd_titles.itemId
WHERE
  comments_srt.active=1 AND
  comments_active.active=1
  AND comments.parentId=m
  
ORDER BY comments_srt.id DESC
LIMIT 0,20

===0

/var/www/baby-nn/data/www/baby-nn.ru/ddsp/lib/core/common.func.php:219
/var/www/baby-nn/data/www/baby-nn.ru/vendors/DbSimple/Generic.php:1265
/var/www/baby-nn/data/www/baby-nn.ru/vendors/DbSimple/Generic.php:889
/var/www/baby-nn/data/www/baby-nn.ru/vendors/DbSimple/Mysql.php:183
/var/www/baby-nn/data/www/baby-nn.ru/vendors/DbSimple/Mysql.php:158
/var/www/baby-nn/data/www/baby-nn.ru/vendors/DbSimple/Generic.php:594
/var/www/baby-nn/data/www/baby-nn.ru/ddsp/lib/more/common/DbSite.class.php:31
/var/www/baby-nn/data/www/baby-nn.ru/vendors/DbSimple/Generic.php:307
/var/www/baby-nn/data/www/baby-nn.ru/ddsp/lib/more/comments/Comments.class.php:114
/var/www/baby-nn/data/www/baby-nn.ru/ddsp/lib/more/pageControllers/comments/PA_comments.class.php:21
/var/www/baby-nn/data/www/baby-nn.ru/ddsp/lib/more/core/PA__common.class.php:430
/var/www/baby-nn/data/www/baby-nn.ru/ddsp/lib/more/core/PA__site.class.php:567
/var/www/baby-nn/data/www/baby-nn.ru/ddsp/lib/more/core/PA__common.class.php:178
/var/www/baby-nn/data/www/baby-nn.ru/ddsp/lib/more/core/PA__site.class.php:61
/var/www/baby-nn/data/www/baby-nn.ru/ddsp/lib/more/core/Dispatcher.class.php:96
/var/www/baby-nn/data/www/baby-nn.ru/ddsp/lib/more/core/Dispatcher_Site.class.php:18
/var/www/baby-nn/data/www/baby-nn.ru/index.php:19