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', '6bsi2ce9c7j23j328bersh4f27', '54.224.56.126', '1540288589', '1540288589', '/catalog/default.php?cPath=50_138&osCsid=e1lueb8f5do2qoibl3qq8s4e07')

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