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', 'rkvjelrsujtps2po25cvtmoea4', '54.224.89.34', '1539651890', '1539651890', '/catalog/product_info.php?products_id=459&osCsid=0bu9p32bim7d4m8k0n64of0s65')

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