1366 - Incorrect integer value: '' for column `ngtkeZ_web1104_2`.`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', 'f2sfiftmga7fjlbrd7n0li7k86', '3.230.1.23', '1711649001', '1711649001', '/address_book.php')

[XT SQL Error]