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', 'a32aa52c6e98c4f503fec0abe8cf03a0', '216.73.216.148', '1755552332', '1755552332', '/product_info.php?info=p2854_Australien-Reliefkarte.html')

[XT SQL Error]