1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '266b57ec849a2d8437f344113c817f87', '3.238.162.113', '1711722130', '1711722130', '/shop_content.php/language/de/coID/23')

[XT SQL Error]