1366 - Incorrect integer value: '' for column `CP_as15`.`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', 'bkc3g9vnlfcdpks0nm2o2be744', '18.216.91.245', '1738997791', '1738997791', '/index.php?XTCsid=3o9rajic4fkoo3bb243kehab14&cat=c518_iPhone-Zubeh--r.html')

[XT SQL Error]