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', 'af5q2uppudd8r6fvh44gaj9ga6', '54.225.26.44', '1539776408', '1539776408', '/catalog/default.php?osCsid=dmusui2jk1bmpilsoiujj9v0g2')

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