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', 's8itbbc9jrvmorl8vi55lk7p27', '54.224.118.247', '1540078141', '1540078141', '/catalog/default.php?cPath=52_192&osCsid=0jesv529pt4s3pv61p39fces03')

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