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', '3mfu9rsde3p4o99jdcjnavana2', '54.198.205.153', '1537683728', '1537683728', '/catalog/default.php?cPath=52&osCsid=q025qg8ep8v2vmlql8p5b1gm27')

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