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', 'rufrj6780pruhuqvair54h3a36', '54.224.247.42', '1540201669', '1540201669', '/catalog/product_info.php?name=Delta%20Sigma%20Theta%20License%20Plate%20-%20STSBG_6102&products_id=505')

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