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', '16g606v6b1fabbol6qrgelc063', '54.80.219.236', '1537718334', '1537718334', '/catalog/product_info.php?products_id=450&osCsid=pgrm7rcj34qh43e2gv3pc5bhe2')

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