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', 'qmbuamvuc2nqr9pfrk3t3t7fp7', '54.196.26.1', '1539625827', '1539625827', '/catalog/password_forgotten.php?osCsid=88kpis156at5k3qp99i98o1o85')

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