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', 'cetqc97dk9hpi7032l2s9dhp87', '54.162.15.31', '1537585136', '1537585136', '/catalog/shipping.php?osCsid=fos6bk4ao12sbq3ahd6vj39hu7')

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