1366 - Incorrect integer value: '' for column `hbl_shop`.`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', 'k4bgibieii529uq5al08386sn0', '3.133.107.82', '1746791319', '1746791319', '/product_info.php?info=p32_800529-Ruebenmuehle--Futtermuehle--Standgeraet.html')

[XT SQL Error]