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', 'gb94phsi21obpja48t9l7mt074', '54.162.239.233', '1537826441', '1537826441', '/catalog/default.php?cPath=56_173&osCsid=tgj5p8qje33s4i6adtfv208as4')

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