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', 'l0oat9je8juehjgei0r6p0b9n1', '44.210.77.106', '1670153018', '1670153018', '/')

[XT SQL Error]