$this->updateTable('post-thread-user', 'contact-id', $from, $to, false);
$this->updateTable('user-contact', 'cid', $from, $to, true);
$this->updateTable('post-thread-user', 'contact-id', $from, $to, false);
$this->updateTable('user-contact', 'cid', $from, $to, true);