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', '1g4ds221b60h4q0o1442nqni30', '54.224.220.72', '1534319226', '1534319226', '/catalog/default.php?cPath=56&osCsid=8glv3ddah3jl0lu14i1h4l4nb2')

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