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', '55n8uloifi8ebg12lsv3sccdq7', '54.145.83.79', '1539695690', '1539695690', '/catalog/product_info.php?products_id=830&osCsid=j1sjfcuktsk9h64c0ksasv0s55')

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