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', 'ghpdeuh98o7tht6mito5i3hhb2', '54.196.26.1', '1539621810', '1539621810', '/catalog/shipping.php?osCsid=gri8opsomilm6l78mk8b1e5n31')

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