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', 'mdj2hncssovvo9imu597r10aj7', '54.224.56.126', '1540290254', '1540290254', '/catalog/shipping.php?osCsid=9vuirppg9bo88k01cjdu7pvk43')

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