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', 'm3jri9jg986rte26h60f7nklt1', '54.156.39.245', '1540220348', '1540220348', '/catalog/default.php?cPath=47_120&osCsid=ocj9b8o0gi2meipg8g9ue1f0r4')

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