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', '5t7sut7ormditthlngg7d5dvh5', '54.224.247.42', '1540252200', '1540252200', '/catalog/default.php?cPath=56_169&osCsid=tojrnmevguome2j0tsj76svnk1')

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