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', '47kgr9a11q5elogevft84gdsn7', '54.196.42.8', '1534677787', '1534677787', '/catalog/product_info.php?products_id=558&osCsid=bvano66u8qpacnv22r6j7kudt6')

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