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', '3vio5gnigon5k28qg3cfd297u6', '54.198.52.82', '1537745088', '1537745088', '/catalog/product_info.php?name=A%20Phi%20A%20Graduation%20Stole%2098430&products_id=829')

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