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', 'bf4skupcbq7mjmke9cva959ko0', '54.92.163.105', '1540150564', '1540150564', '/catalog/default.php?cPath=48_153&osCsid=rj97frenr7vr9pg12john2iat1')

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