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', '4u0pvq63m36bf8lc7d80ekk4k0', '54.81.150.27', '1537290841', '1537290841', '/catalog/product_info.php?products_id=793&osCsid=ldmmitulveqlrrfac9gbbh8241')

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