1366 - Incorrect integer value: '' for column `shop_db3`.`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', '6facb48f98933a67a02e71a3feb781d2', '18.188.20.56', '1713989769', '1713989769', '/product_info.php?info=p248_Memory-Of-Spain.html&XTCsid=2c82651c29181c0e0b67329d45f74355')

[XT SQL Error]