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', 'gu2i871h8ubomkchiisdhmfb04', '3.15.221.165', '1746953893', '1746953893', '/product_info.php/info/p6425_ISO-6309-KNS--Feuerl--scher.html')

[XT SQL Error]