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', 'gvn0uur7vc0o54t801ni6tuoc0', '54.225.26.44', '1539860497', '1539860497', '/catalog/default.php?cPath=56&osCsid=ul5eddknpcfjabdtff6i3n2o30')

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