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', '3eff02b49ef8888d0b2ebb96b66f5552', '216.73.216.20', '1771725340', '1771725340', '/product_info.php?info=p3480_Armenien-Reliefkarte.html')

[XT SQL Error]