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', '5e94266fd6f2d7d8ab13298596dda3c8', '3.145.168.147', '1722065277', '1722065277', '/login.php')

[XT SQL Error]