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', '05ckifvh6libd1lq9bhcd5rc53', '3.235.45.196', '1596906473', '1596906473', '/')

[XT SQL Error]