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', '064dtkv5j9qpm5396r9dgeg0q6', '54.198.142.121', '1537922216', '1537922216', '/catalog/default.php?osCsid=17oiuj9p0kr8toobqs7ehsbbs7')

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