Hi @Ptran,
I think you’re running into bad data in your database, similar to this issue but in a different table. Try the following SQL query:
SELECT a.setting_name
FROM submission_file_settings a
JOIN submission_file_settings b ON (a.setting_name = b.setting_name)
WHERE (a.locale IS NOT NULL AND a.locale <> '')
AND (b.locale IS NULL OR b.locale = '');
You should get no results, but I suspect you’ll get some. These will have to be resolved before the upgrade will work.
Regards,
Alec Smecher
Public Knowledge Project Team