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', '3ui28ksf50s030lm0ju66ve4g5', '216.73.216.42', '1761526109', '1761526109', '/index.php?cat=c21_Balaphone-Balafon.html')

[XT SQL Error]