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', 'o9ufjkjafmg11oj35bep34ngp6', '54.92.160.119', '1539709096', '1539709096', '/catalog/default.php?cPath=29_228&osCsid=8erko6u1fv9rgeh1gnu5lcf6k1')

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