Check if code needs changing for Integrity constraint violation: 1052 Column 'status' error

Today the following message was thrown when attempting to view a forum:

PDOException: SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'status' in where clause is ambiguous: SELECT f.tid AS tid, COUNT(n.nid) AS topic_count, SUM(ncs.comment_count) AS comment_count FROM {node} n INNER JOIN {node_comment_statistics} ncs ON n.nid = ncs.nid INNER JOIN {forum} f ON n.vid = f.vid INNER JOIN {node} node ON f.tid = node.tid WHERE (status = :db_condition_placeholder_0) AND (n.language IN (:db_condition_placeholder_1, :db_condition_placeholder_2)) GROUP BY tid; Array ( [:db_condition_placeholder_0] => 1 [:db_condition_placeholder_1] => de [:db_condition_placeholder_2] => und ) in advanced_forum_forum_load() (Zeile 142 von /var/www/html/cm7/sites/all/modules/advanced_forum/includes/core-overrides.inc).

Unfortunately I have no idea which of recent updates of my site is causing this error. The site is updated to Drupal 7.12 and all other modules are up-to-date as well.