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', 'l5a497f63imo5smplj318s84f1', '54.158.52.166', '1537362541', '1537362541', '/catalog/default.php?cPath=56&osCsid=kuovha5je0p2i5273kh9j8qci2')

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