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', '5asc6nhduo8tfu8guq8rqrac91', '54.198.205.153', '1537759186', '1537759186', '/catalog/product_info.php?products_id=472&osCsid=59bdfsm7dsojsmb9igegi3ja87')

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