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', '72ghq912u4bq3s7965pm01ud52', '216.73.216.40', '1769936968', '1769936968', '/product_info.php/info/p6960_ISO-7010-E-005--Richtungsangabe-links-rechts.html')

[XT SQL Error]