1366 - Incorrect integer value: '' for column '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', '93b45f457eda3ca2ac0933ba3ef8ade1', '18.221.165.246', '1714094732', '1714094732', '/product_info.php/info/p82_Obst---Akazie.html')

[XT SQL Error]