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', 't68i75e0vf95bspb48r3a37e54', '54.161.71.87', '1537794912', '1537794912', '/catalog/product_info.php?cPath=56_169&products_id=659&osCsid=gkrpgksohtge02vemj2gvuagk1')

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