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', 'fbvqtm9arvhhl3snp3v7nt1da5', '54.224.89.34', '1539652377', '1539652377', '/catalog/product_info.php?cPath=49_178&products_id=889&osCsid=82gbmmuj30sntm6ebdrfub29f5')

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