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', 'c3210f70c652d77b940a65721e5f8b6c', '216.73.216.3', '1767297108', '1767297108', '/product_info.php?info=p3202_Ungarn-Reliefkarte.html')

[XT SQL Error]