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', 'j4in3fau23abgdktobm7fjj6k4', '54.198.205.153', '1537759367', '1537759367', '/catalog/product_info.php?name=Alpha%20Phi%20Alpha%20Domed%20Metal%20License%20Plate%20Frame%20-%20Gold%20Sig%20DPFG&products_id=365')

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