1366 - Incorrect integer value: '' for column `usr_web74_1`.`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', '9r2oiqvtpnec62p7nnaqpkrlr4', '216.73.216.170', '1767764331', '1767764331', '/advanced_search.php')

[XT SQL Error]