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', 'e173933cf3cf10dc599937a65981f806', '216.73.216.3', '1767296973', '1767296973', '/product_info.php?info=p1581_Oman-Satellitenbild.html')

[XT SQL Error]