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', '1n8odg73h2u2k2nfcprs02q6f5', '216.73.216.200', '1752881128', '1752881128', '/product_info.php/info/p5942_B-10-Kuebelspritzen.html')

[XT SQL Error]