1366 - Incorrect integer value: '' for column 'customer_id' at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', '871ce97a166e47b858f3de32a6f2565f', '216.73.216.213', '1767294779', '1767294779', '/shop/index.php?cat=c7_.html')

[XT SQL Error]