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', 'u1dr2pgf7iagknas6pudvvrgu0', '54.198.205.153', '1537489857', '1537489857', '/catalog/default.php?cPath=52_188&osCsid=o784raee59n7cb4v99gl80tir1')

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