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', '192t8j92f4r92qv59j5b16ppc7', '54.161.116.225', '1540209109', '1540209109', '/catalog/product_info.php?name=Delta%20Sigma%20Theta%20License%20Plate%20-%20STFBG_6302&products_id=500')

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