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', 'blp6tpusuhemtk0ote7m1l2c16', '54.161.77.30', '1539674668', '1539674668', '/catalog/product_info.php?name=DST%20Graduation%20Stole%2098516%20red%20fortitude&products_id=834')

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