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', 't9srfhk5pcdp6tqek50k05m9r3', '216.73.216.3', '1762303303', '1762303303', '/product_info.php/info/p5787_PG-9-Ai-Pulverloescher-Neutrex-Super.html')

[XT SQL Error]