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', '7t3stra4sad12miae487b4sga2', '54.198.212.30', '1539876319', '1539876319', '/catalog/default.php?cPath=49_182&osCsid=ml78qido8223rl91gb78jm51a3')

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