# Recovering from message alteration

**URL:** https://forum.duplicati.com/t/recovering-from-message-alteration/13638
**Category:** Support
**Created:** [December 23, 2021, 2:43pm UTC](https://forum.duplicati.com/t/recovering-from-message-alteration/13638 "2021-12-23T14:43:04Z")
**Posts on this page:** 1
**Showing post:** 10

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### Author: ![obones](https://forum.duplicati.com/user_avatar/forum.duplicati.com/obones/32/1627_2.png) [@obones](https://forum.duplicati.com/u/obones)
#### Post date: [January 4, 2022, 2:38pm UTC](https://forum.duplicati.com/t/recovering-from-message-alteration/13638/10 "2022-01-04T14:38:40Z")

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> [@ts678](#):
>
> Do you by any chance have log-retention set to `14D`?

I do not specify it on the command line, so I believe it has its default value of `30D`. But the source data does not change not that often, so it’s completely possible nothing happened between mid November and mid December.

> [@ts678](#):
>
> [The TEST command](https://duplicati.readthedocs.io/en/latest/04-using-duplicati-from-the-command-line/#the-test-command) from [Commandline](https://duplicati.readthedocs.io/en/latest/03-using-the-graphical-user-interface/#using-the-command-line-tools-from-within-the-graphical-user-interface) or shell can also test-on-demand as many files as you would like.

Yes, I ran it on another backup that has a local hard drive as a target, and it worked just fine. Well, it complained about extras, but it appears these are benign and can be [ignored](https://forum.duplicati.com/t/verify-a-specific-dblock-zip-aes-file/3500/6)

> [@ts678](#):
>
> It may slow upload rates

Yes, it slows them to a crawl, B2 is throttling individual uploads.

> [@ts678](#):
>
> Would you consider helping any with either SQL queries or issues that might flat-out be SQLite

I can give a hand, yes, of course. That being said, I have never encountered an error in SQLite itself, but always in my own setup of the library, or the queries I run against it.

For the problem at hand, I have created an [issue](https://github.com/duplicati/duplicati/issues/4658) to get the name of the broken file even at default log level. Then I removed the broken file from the backend as it keeps popping up as an error, ran `list-broken-files` and `purge-broken-files` to, I hope, get to a fixed situation.

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