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', 'rtvcrf0p6egqakbj9u8l6q8v83', '54.162.118.107', '1539773237', '1539773237', '/catalog/default.php?cPath=49&osCsid=jkrk2k1qcctt49tlfveaqpk0s6')

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