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', 'iiadfc3uufqpp99f7d85b9gsd1', '54.92.163.105', '1539649776', '1539649776', '/catalog/default.php?cPath=49_247&osCsid=oqajt8bgtfvgbobrb8p4sjoa14')

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