为什么postgresql语句不起作用？

with updatedcontacts (contact_id, list_id, firstname) as 
 values (13680724,457,'James'),(13680723,457,'Stanley') 
update contacts c 
  set c.firstname = u.firstname 
from updatedcontacts u 
where u.contact_id = c.contact_id 
  and u.list_id = c.list_id;

抛出错误：
错误：“values”行52处或附近出现语法错误：…updatedcontacts（contact\u id，list\u id，firstname）作为值（^sql state:42601 character:2944）