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', '820cf406c5f6652e7c6a069676e9d544', '3.145.70.14', '1738735272', '1738735272', '/product_info.php/info/p439_Reliefkarten-Konfigurator.html?refID=1')

[XT SQL Error]