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', 'r2f6h3me7jmkaf99lnfgvlf5d2', '54.161.71.87', '1537796400', '1537796400', '/catalog/default.php?cPath=47_111&osCsid=lkc0l5kvv1luvua77dhkc268p0')

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