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', '1bfcf687c3e395b2ad99e968e0628bdb', '3.138.174.95', '1714148794', '1714148794', '/checkout_shipping.php')

[XT SQL Error]