1366 - Incorrect integer value: '' for column `pella-ware`.`whos_online`.`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', '07d754a2272c3064ffc58a19066ed851', '44.221.43.208', '1710856839', '1710856839', '/checkout_shipping.php')

[XT SQL Error]