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', 'e1267302db837a3196749ab361a973b5', '216.73.216.3', '1767297386', '1767297386', '/product_info.php?info=p2940_Gabun-Reliefkarte.html')

[XT SQL Error]