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', 'tdeeme8g7406ucrp7j7agjegs4', '54.80.96.153', '1537791455', '1537791455', '/catalog/product_info.php?name=Auto%20reflective%20decal&products_id=402')

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