1366 - Incorrect integer value: '' for column `db162720`.`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', 'a1j9789qh66hgir86huk46jhj1', '3.236.111.234', '1710825311', '1710825311', '/shop_content.php/coID/1/content/Shipping---Returns')

[XT SQL Error]