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', 'ed695b60f1b5d63036dd205521e23d4f', '216.73.217.121', '1780759212', '1780759212', '/')

[XT SQL Error]