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', 'e112rrnu2pc1e48h5aukfoekg0', '18.97.14.82', '1752192339', '1752192339', '/product_info.php?info=p13_800062-Einsatz-fuer-100-Liter-Futterdaempfer--vollverzinkt-.html')

[XT SQL Error]