Вы сказали:
Возможно в данном пример добавить заменять в subject_post и text_post Если есть текст разный например TL_345 на TL_653
INSERT INTO message (
order_id, chat, uid_inbox, uid_id, subject_post,
text_post, attach_post, from_send, account_id_send,
email_group_id, account_create, account_id_status_deal,
feed_type_source, date_create, date_update
)
SELECT -- куда новая 811
811 AS order_id, chat, uid_inbox, uid_id, subject_post,
text_post, attach_post, from_send, account_id_send,
email_group_id, account_create, account_id_status_deal,
feed_type_source, date_create, date_update
FROM message
WHERE order_id = 795; --старая от куда 795