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', '2p7n0oi6o5t8pp724a8kbmtrf4', '54.225.26.44', '1539778052', '1539778052', '/catalog/default.php?cPath=51_206&osCsid=e1c7cl785ft96uttess2b9pen1')

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