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', 'aijv27va5hekst00j0d0gae2f4', '54.156.51.193', '1537339137', '1537339137', '/catalog/default.php?cPath=52_248&osCsid=kuovha5je0p2i5273kh9j8qci2')

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