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', 'rmsqphp0g7c7m53rmnamoknc13', '44.220.251.236', '1728314736', '1728314736', '/')

[XT SQL Error]