1366 - Incorrect integer value: '' for column `schablone_1`.`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', '99cc9603f69e51adf27693baac718991', '3.237.15.145', '1728636275', '1728636275', '/shop/index.php')

[XT SQL Error]