@Srinivasu2
When an update set is deleted in a specific instance, an error message appears indicating that a certain number of customer updates could be affected. This implies that the changes captured in the update set might be lost in that instance.
Solution: To address this, simply redeploy the same update set from the development instance to the test instance once again. It's possible that you may encounter preview update set errors during this process. In that case, you should accept all the errors that arise. This will help restore the changes and ensure that the intended updates are applied correctly in the test instance.
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