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', 'ej5e8brkt5kb9r7ljd1g03fac5', '54.166.203.17', '1537676227', '1537676227', '/catalog/product_info.php?products_id=420&osCsid=ebmof5e6gh12ojud0o6ic2bbd5')

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