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', '5gq2mev9mavf2c10pdbc8fb6r3', '54.198.205.153', '1537682605', '1537682605', '/catalog/product_info.php?products_id=571&osCsid=abj3lncob7t2muta8gk9ilmv56')

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