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', '9ehsm9lmo25v5tdge48muqaop0', '54.80.140.29', '1534510475', '1534510475', '/catalog/checkout_confirmation.php?osCsid=60p7vqr133j78cevlfoq8gjs51')

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