Ticket #21706: 21706.patch

wp-includes/comment.php

@@ -1484 +1484 @@
         else if ( 'approve' == $comment_approved )
                 $comment_approved = 1;
 
-        $data = compact('comment_content', 'comment_author', 'comment_author_email', 'comment_approved', 'comment_karma', 'comment_author_url', 'comment_date', 'comment_date_gmt');
+        $data = compact( 'comment_content', 'comment_author', 'comment_author_email', 'comment_approved', 'comment_karma', 'comment_author_url', 'comment_date', 'comment_date_gmt', 'comment_parent' );
         $rval = $wpdb->update( $wpdb->comments, $data, compact( 'comment_ID' ) );
 
         clean_comment_cache($comment_ID);