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', 'c4p9jmphua1u5rb0lvu6kfd5d7', '216.73.216.19', '1771021669', '1771021669', '/product_info.php/info/p6547_BGV-A8-W-19--Warnung-vor-Gasflaschen.html')

[XT SQL Error]