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', 'b8n45k24vv68b6ioe1g690i4q3', '54.224.247.42', '1539994854', '1539994854', '/catalog/checkout_confirmation.php?osCsid=8gbo9gpp1shp6q509a7614gbp7')

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