> For the complete documentation index, see [llms.txt](https://helpcenter.xopero.com/xopero-one-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helpcenter.xopero.com/xopero-one-en/common-issues/workstations-and-servers/backup-finishes-with-a-dv0140-unable-to-query-string-error.md).

# Backup finishes with a "DV0140: Unable to query string" error

## Issue

> Backup finishes with a **"DV0140: Unable to query string"** error message.

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## Cause

If you see this message, it may indicate an issue with a device included in the backup plan. Typically, this occurs when the device’s license has been deactivated or detached; this error can also appear during a platform update or while migrating the **Xopero ONE Management Service**.

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## Resolution

To quickly resolve this issue, remove the device from the web panel and then reassign it. Make sure to **update all backup plans** by reassigning the device in each plan as needed.