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', 'e3f47cvb9i30f2060bagbmj643', '54.198.15.20', '1540359494', '1540359494', '/catalog/shipping.php?osCsid=idhmg1fj7mcud74cidk40ag3b1')

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