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', 'r3hj20ffei96k8p94q88hu73e0', '3.135.224.139', '1746951552', '1746951552', '/product_info.php/info/p6428_ISO-7010-F-005-KNS--Brandmelder-manuell.html')

[XT SQL Error]