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', '249a5d2b6c0c36d15726b0a6cc59f43a', '216.73.216.28', '1763615819', '1763615819', '/product_info.php?info=p3419_Jemen-Reliefkarte.html')

[XT SQL Error]