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', 'ghmjv2eg4uknkl4ac3jua57ru2', '54.156.51.193', '1537571334', '1537571334', '/catalog/create_account.php?osCsid=k8mqjbphae69tfbnhht1ap1j44')

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