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', '024hj0o6j8m21q4dq63gc5umj0', '54.80.219.236', '1537298963', '1537298963', '/catalog/product_notifications.php?osCsid=igfd37frj5ho3siavik3tg11d0')

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