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', '4hrsmcok7ks2t9bs7pvioad152', '54.196.26.1', '1539627302', '1539627302', '/catalog/product_info.php?products_id=347&osCsid=ssoa697mb3n0alhgir1glrtpp4')

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