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', 'nip820gn8tmmv6emanvpn0rod0', '54.225.26.44', '1540273691', '1540273691', '/catalog/product_info.php?products_id=347&osCsid=hiqkb8br5601t95lvv1hdig0f3')

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