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', '6655f4a48fd4f09da4279c235b4555a6', '216.73.216.213', '1767294853', '1767294853', '/shop/index.php?cat=c25_.html')

[XT SQL Error]