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', '78f31d0ceb8ec45cb31f985387ef66c1', '216.73.216.3', '1767615042', '1767615042', '/product_info.php?info=p3496_Slowenien-Reliefkarte.html')

[XT SQL Error]