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', '5a02gajropbka4fjf9mgcalu24', '216.73.216.200', '1752881348', '1752881348', '/product_info.php/info/p677_Verhalten-im-Brandfall---Brandschutz-Zeichen.html')

[XT SQL Error]