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', 'kqgj9ee593kq0gmjo206oo5v00', '54.80.87.166', '1540313203', '1540313203', '/catalog/default.php?cPath=51_213&osCsid=p6u1nlpglklofj88d0jv7lu3t3')

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