1366 - Incorrect integer value: '' for column `pella-ware`.`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', '8a2bd8d8c529da4f780e71fad4818a3a', '216.73.217.33', '1786327906', '1786327906', '/')

[XT SQL Error]