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', 'l6093791mml1alhk89rdu6s724', '18.218.251.50', '1746763518', '1746763518', '/index.php?cat=c64_Zubehoer-Elektrodaempfer.html')

[XT SQL Error]