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', 't01b6gri36e46pkj64e4k47ph7', '216.73.216.6', '1752292220', '1752292220', '/product_info.php/info/p5841_KS-5-BG-Stahl-Kohlendioxidloescher.html')

[XT SQL Error]