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', '9nrrvpigtnr1p2m47skc0cnd82', '54.198.55.167', '1539755228', '1539755228', '/catalog/default.php?cPath=52&osCsid=oc5248v44d162t0bos5dh64bv1')

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