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', 'v9bu9kij31qvv06emv6kc6be47', '18.119.167.10', '1738998660', '1738998660', '/index.php?XTCsid=nmu1l7bj1113ksvu525rsptc72&cat=c1320_LiFePo4-Akkus.html')

[XT SQL Error]