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', '8ke4119b59fq7mr52qp45ajom5', '54.80.87.166', '1540309057', '1540309057', '/catalog/default.php?cPath=48&osCsid=88kpis156at5k3qp99i98o1o85')

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