Introduction

The provided key element does not match the schema is a common error when trying to validate an XML document against an XML schema. This can happen for a number of reasons, but the most common reason is that the key element is not defined in the schema.

If you get this error, check to make sure that the key element is defined in the schema. If it is not, you will need to add it to the schema before you can validate the document.

What is a validationexception?

A validationexception is an exception that occurs when the data in a XML document does not match the schema that is associated with that document. This can happen when the schema is changed and the data in the document is not updated to match the new schema, or when the data in the document is corrupted.

How to fix a validationexception

If you see a “validationexception the provided key element does not match the schema” error in your logs, it means that one or more documents in your database do not match the schema that you have defined for your app.

There are a few ways to fix this:

1. Use the data migration tool to update your database schema. This will automatically update all of your documents to match the new schema.
2. Update your code to handle the new schema. This will require you to update any code that accesses the affected documents.
3. Delete the affected documents from your database. This will permanently remove them from your app and should only be done if you are sure that you no longer need them.
   Conclusion
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