1366 - Incorrect integer value: '' for column `abtecsho_shop`.`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', 'kfqkouohlkvp28udhbplnrja54', '52.15.123.168', '1746781820', '1746781820', '/product_info.php/info/p6307_ISO-7010--E001-E005--KNS--Rettungsweg---Notausgang.html')

[XT SQL Error]