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', '331e3bf7bfa3764e549f292ffaf8b4b0', '18.222.69.152', '1714175936', '1714175936', '/account_password.php')

[XT SQL Error]