---
title: Configuration version discrepancy detection
summary: Detect situations when a shield server might have a different version of your code than the edge server, and avoid errors that this might cause.
url: https://www.fastly.com/documentation/solutions/examples/configuration-version-discrepancy-detection
---

Detect situations when a shield server might have a different version of your code than the edge server, and avoid errors that this might cause.

## VCL

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/5b66d641)