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', 'a659k5eu1de9s24ufp6li26lr1', '54.198.212.30', '1540110799', '1540110799', '/catalog/product_info.php?products_id=390&osCsid=ineuieb3vsqku9qkhfkkcg1pi6')

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