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', '6ep5l6vfhk5nj3k3m5i6tld185', '54.224.247.42', '1539811542', '1539811542', '/catalog/product_info.php?products_id=828&osCsid=29aqtvl2l0ni685mt6g25b7lt0')

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