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', 'da5710fa71c6fac8041e53e02ba68607', '18.117.183.150', '1714106612', '1714106612', '/products_new.php')

[XT SQL Error]