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', '67tbcjgdu1dh2jtod9sfh1ndp5', '54.198.27.243', '1534576248', '1534576248', '/catalog/product_info.php?products_id=450&osCsid=p49bnl551cbb3gt8kes563p1f5')

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