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', 'grth429qu2u1qq63heru7fhu36', '54.162.118.107', '1539769626', '1539769626', '/catalog/product_info.php?products_id=711&osCsid=4o5mi8sf653d9p4j4jesah05j2')

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