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', '1vjnv29jt88k1f0nfpmsma79v7', '54.224.247.42', '1539810741', '1539810741', '/catalog/product_info.php?products_id=479&osCsid=0bu9p32bim7d4m8k0n64of0s65')

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