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', 'mmrus5gcai3fjhn63uel7vods5', '54.198.55.167', '1539753170', '1539753170', '/catalog/allprods.php?osCsid=jafi5mujpkmu3k6k2poeokfii4')

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