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', 'jfnk2gs4s3h0jp85thle2pvmv0', '54.224.11.137', '1534860762', '1534860762', '/catalog/shopping_cart.php?osCsid=l7ortvtu927ggi4iev0liinhj2')

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