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', 'o6u0rhnb76nnnd235re3i9okg2', '54.161.77.30', '1540296634', '1540296634', '/catalog/default.php?cPath=50_140&osCsid=hdu5vkilg3o0qa1treq66p3ho7')

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