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', 'obqmrn02pbk9jrpoi0n6jcljg7', '54.225.55.174', '1534236917', '1534236917', '/catalog/product_info.php?products_id=489&osCsid=h17pm4hvki90lv2c0hm3b9o272')

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