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', 'l5e17j8u8iilojivl5pj6hm370', '54.80.87.166', '1539615299', '1539615299', '/catalog/product_info.php?products_id=462&osCsid=ldt43h81tpv9sokqvu1eu93f65')

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