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', '2j6io4qckaec5pudb0568od4p6', '54.161.71.87', '1537599241', '1537599241', '/catalog/product_info.php?products_id=159&osCsid=ielbclds7qrpu4vhvqhb9bd5r7')

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