1366 - Incorrect integer value: '' for column `pella-ware`.`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', '0th4jtq1h0j6gaep09rof8rav4', '3.138.204.208', '1713561818', '1713561818', '/login.php?XTCsid=0th4jtq1h0j6gaep09rof8rav4')

[XT SQL Error]