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', 'lo4j64fmp63o8nscgd9k5a3hv1', '3.15.2.88', '1746952291', '1746952291', '/product_info.php/info/p6330_KNS-Textschild--Notausstieg.html')

[XT SQL Error]