I received this error message retrieving a document I last opened on 20th Aug. Is there a debug report or something I can query to find out more information about the error? If not, there is no way for me to find out what the error means, and that in itself is worrying me. I will upload the changes I have to make to the site but the fear is that I will also be uploading an automated change to something that will affect another part of the site.

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I also opened the last few backups I have of this document and they also show the error. Yet this is the first time I have seen this error.