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', 'ab3188c14783d57ec06fa158c5d8a9bd', '216.73.216.108', '1763414838', '1763414838', '/product_info.php?info=p10_3D-Druck.html')

[XT SQL Error]