节点更新挂钩Cron

我正在尝试更新hook_cron函数上的Node。我使用Drupal6这里是我的代码节点更新挂钩Cron

function offers_cron() { 
$query= db_query("SELECT * FROM {node} WHERE type = 'product'"); 
while($allnodes = db_fetch_object($query)){ 
    $node_id=$allnodes->nid; 
    $node=node_load($node_id); 
$node = new stdClass(); 
    $node->nid = $node_id; 
    $node->type = 'product'; 
    $node->language = 'en'; 
    $node->uid=1; 
    $node->status = 1; 
    $node->created = time(); 
    $node->changed = $node->created; 
    $node->comment=0; 
    $node->promote = 0; 
    $node->sticky = 0; 
    $node->format = 2; 
    $node->title='test'; 
    $node->field_price[0]['value']='120'; 
    if ($node = node_submit($node)) { 
     node_save($node); 
      drupal_set_message(t("Node ".$node->title." added correctly")); 
    } else { 
     drupal_set_message(t("Node ".$node->title." added incorrectly"), "error"); 
    } 


} 


}

现在它显示它已更新，这里所有的节点是屏幕截图，该 enter image description here