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', '46544da25b08108237c6c0b4752f1737', '216.73.216.190', '1776280730', '1776280730', '/shop/product_info.php?info=p44_.html')

[XT SQL Error]