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', '56v2cdhoob0ajp2j6v7rv6hbi1', '54.224.89.34', '1539652016', '1539652016', '/catalog/default.php?cPath=51&osCsid=qho3pb2ggvt6f65ffjlbr615n1')

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