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', 'e4as7pljicf7t3pv6gcf3gdit4', '54.156.51.193', '1537572676', '1537572676', '/catalog/password_forgotten.php?osCsid=k8mqjbphae69tfbnhht1ap1j44')

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