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', 'tjvk78r7giosu0p20q955b0nk5', '216.73.216.71', '1752608480', '1752608480', '/product_info.php/info/p7053_ISO-7010--ASR-1-3--Feuerloeschdecke.html')

[XT SQL Error]