1366 - Incorrect integer value: '' for column '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', '8ae7cc3195aabfcc7cf9da49bd2676f0', '100.26.179.41', '1716149551', '1716149551', '/')

[XT SQL Error]