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', 'qqks70gatjaogpcvh8k8bfsq92', '54.156.39.245', '1540217938', '1540217938', '/catalog/product_info.php?products_id=154&osCsid=e1lueb8f5do2qoibl3qq8s4e07')

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