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', '9uk3ihcdmdgj7j5dl65r7j7q81', '54.80.219.236', '1537710381', '1537710381', '/catalog/product_info.php?products_id=399&osCsid=ntc59ptq2njuj8p88lgnqd2jt5')

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