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', '3qa32rpmnn7401mnh5lmeu8l27', '54.80.96.153', '1537388291', '1537388291', '/catalog/products_new.php?osCsid=gt1atq5aqb0h7n96ma4m8poe36')

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