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', 'mk8169vqrur61bui5opl5fppt0', '54.167.243.214', '1534805694', '1534805694', '/catalog/product_info.php?products_id=914&osCsid=o62m0vraltudm032ajo0jlie87')

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