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', 'dh7paqap4fqestk487ni11uqt1', '54.166.130.157', '1540321209', '1540321209', '/catalog/checkout_confirmation.php?osCsid=k5tggcn4cvs45ejl12ugg081d1')

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