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', 'b2a3fd8c920234ea7e47911e2038eddb', '216.73.216.20', '1771725346', '1771725346', '/product_info.php?info=p3457_Philippinen-Reliefkarte.html')

[XT SQL Error]