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', 'cdfc6d1d057b1eee117befdbec285597', '216.73.216.42', '1763354632', '1763354632', '/shop/product_info.php?info=p5_.html')

[XT SQL Error]