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', 'bflt1sou16ok0po1162974ke23', '216.73.216.80', '1766969944', '1766969944', '/product_info.php/info/p6940_ISO-7010-M-004--Augenschutz-benutzen.html')

[XT SQL Error]