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', '1ac73cc5a6817e00a7dbf5294e467d0f', '3.135.205.146', '1713424955', '1713424955', '/index.php')

[XT SQL Error]