<p>This is an indication that someone removed a field from work item configuration that was represented by <code>25</code>.  It's more of an issue of clean-up not being done when fields are removed.  See more about <a href="https://developercommunity.visualstudio.com/content/problem/260665/tf51535-in-client-tf400645-in-web-after-deleting-a.html" rel="nofollow noreferrer">this error</a> on Microsoft's Developer Community. </p>

<p>This <a href="https://developercommunity.visualstudio.com/content/problem/476709/clone-test-plan-fails.html" rel="nofollow noreferrer">other item in the community</a> suggests a different problem when using a particular extension and a fix has been supplied.</p>

CC BY-SA 4.0
2019-03-27T17:55:29.167Z
2019-03-27T17:55:29.167Z
Sumo
<p>Today I received an error when trying to clone test plans in Azure DevOps web portal. 
Steps:</p>

<ol>
<li><p>In Visual Studio, I select the Test Case option</p></li>
<li><p>I find the Test Plan I want to clone, select it , and then select the "Clone test plan" button.</p></li>
<li><p>In the "Clone Test Plan" window, accept all defaults and click Clone.</p></li>
</ol>

<p>Result: an error is received: "Clone operation encountered a WorkItem Tracking error while processing test case xxxx. Retry the operation. Error details: TF51535: Cannot find field 25."</p>

<p>It is extremely unfortunate that this issue happened today while I am trying to clone a large test plan. I will have to manually copy the hundreds of tests in order to have the new test plan ready for Monday morning.</p>

<azure-devops>
WorkItem Tracking error when performing clone operation in Azure Devops
Yishu Wang
# WorkItem Tracking error when performing clone operation in Azure Devops

(Asked by: username_0 on 2019-03-08)

Today I received an error when trying to clone test plans in Azure DevOps web portal.
Steps:

1. In Visual Studio, I select the Test Case option
2. I find the Test Plan I want to clone, select it , and then select the "Clone test plan" button.
3. In the "Clone Test Plan" window, accept all defaults and click Clone.

Result: an error is received: "Clone operation encountered a WorkItem Tracking error while processing test case xxxx. Retry the operation. Error details: TF51535: Cannot find field 25."

It is extremely unfortunate that this issue happened today while I am trying to clone a large test plan. I will have to manually copy the hundreds of tests in order to have the new test plan ready for Monday morning.

**Tags:** azure-devops


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## 1 answers

### Answer by username_1 on 2019-03-27. Score: 1

This is an indication that someone removed a field from work item configuration that was represented by `25`. It's more of an issue of clean-up not being done when fields are removed. See more about [this error](https://developercommunity.visualstudio.com/content/problem/260665/tf51535-in-client-tf400645-in-web-after-deleting-a.html) on Microsoft's Developer Community.

This [other item in the community](https://developercommunity.visualstudio.com/content/problem/476709/clone-test-plan-fails.html) suggests a different problem when using a particular extension and a fix has been supplied.


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