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', 'ab5t69v63bm87eco0j3t9o4s05', '216.73.216.110', '1752050651', '1752050651', '/index.php?cat=c8_Disposable-tableware.html&XTCsid=d3f81aac1b90a5822d8663a3af39931e')

[XT SQL Error]