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', 'e82lp36dcrv082i0hlcscce2l5', '216.73.216.178', '1775417271', '1775417271', '/xtshop/index.php?cat=c1_.html')

[XT SQL Error]