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', '9ve5f6mv1gs1oe6tph75hbrkj3', '3.144.179.230', '1738999673', '1738999673', '/index.php?XTCsid=3o9rajic4fkoo3bb243kehab14&cat=c486_Ohrh--rer-und-Lautsprecher.html')

[XT SQL Error]