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', 'c8adfbts52bp7nmu3771v8jhd3', '54.80.96.153', '1537617017', '1537617017', '/catalog/default.php?cPath=52_188&osCsid=fos6bk4ao12sbq3ahd6vj39hu7')

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