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', 'nabhd6gkm0qhies0p37clgigg4', '54.198.15.20', '1540358914', '1540358914', '/catalog/default.php?cPath=46_253&osCsid=ul5eddknpcfjabdtff6i3n2o30')

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