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', 'ppp9qh0bvj5rg04s99gd5rv3h0', '3.19.76.4', '1746946646', '1746946646', '/product_info.php/info/p6427_ISO-7010-F-006-KNS--Brandmeldetelefon.html')

[XT SQL Error]