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', '0oame5ohc9kt2l02ecvni17op0', '54.224.118.247', '1540188044', '1540188044', '/catalog/default.php?cPath=56_173&osCsid=nivt3a86qnnfe94f7d4ur1s9i3')

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