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', 'm961qjtanm6qh1ismfar030493', '3.144.255.53', '1746969982', '1746969982', '/product_info.php?info=p607_805807-Badeofen-Mischbatterie--druckfest.html')

[XT SQL Error]