1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '70ec0d1cbcda4e2b7d7ca89371b235f7', '216.73.216.148', '1755540874', '1755540874', '/product_info.php?info=p1757_Andorra-Satellitenbild.html')

[XT SQL Error]