1366 - Incorrect integer value: '' for column 'customer_id' at row 1

insert into user_tracking (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url, page_desc, referer_url) values ('', 'Guest', 'tjf4iv9kp3gigtt1r1alm2d2n2', '54.221.9.6', '1542794098', '1542794098', '/index.php/cPath/24?osCsid=k72cb9n8id5ntp7k1fla7ajlj0', 'Kosttillskott', '/index.php/cPath/24?osCsid=k72cb9n8id5ntp7k1fla7ajlj0')

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