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Request URL: http://www.minenergia.gov.co/documents/10192/23886159/080817_py_modifica_cap_4_retilap_030817.pdf/89d7da4f-c759-42bc-913e-2153c8cd4cce
Raised by: wagtail.documents.views.serve.serve

This document does not match the given filename.

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.