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', '9jn2rs0ng04mcmrl9cl4n8ja00', '54.224.89.34', '1540197000', '1540197000', '/catalog/product_info.php?products_id=158&osCsid=u0iei2avru639pns26fkm4trh4')

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