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', 'lhit4q9pv0gsm4uka3m9hj1sr5', '54.80.140.29', '1534510483', '1534510483', '/catalog/default.php?cPath=29_234&osCsid=4uc9d5jgo4kouck02c1kvqtp43')

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