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', 'a4mkr2g8q7hq7bi9818p2ik4d0', '54.198.52.82', '1537843618', '1537843618', '/catalog/default.php?cPath=57_202&osCsid=3hlus84eu7q9nd2rdne3hu5l03')

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