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', 'd88495a166ee68e4a5a7fd80b2052313', '3.235.227.36', '1711641103', '1711641103', '/redirect.php?action=product&id=15')

[XT SQL Error]