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', 'kgl4bvegann9nd17m7bh970up7', '54.166.141.69', '1537385557', '1537385557', '/catalog/default.php?cPath=47_118&osCsid=jqq7a67srnv248t4gg6vfktun7')

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