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', 'qi1q33ju6tsh178ejvma0qhhi5', '54.80.93.19', '1534560028', '1534560028', '/catalog/product_info.php?products_id=791&osCsid=oqajt8bgtfvgbobrb8p4sjoa14')

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