DOC Show more information in ValidationException message

en/08_Changelogs/6.0.0.md

@@ -49,6 +49,7 @@ title: 6.0.0 (unreleased)
   - [Update JS MIME type, remove `type` in `<script>` tags](#js-mime-type-update)
   - [`getSchemaDataDefaults()` now includes attributes](#formfield-schema-data)
   - [Remember me token rotation](#remember-me-token-rotation)
+  - [Validation exceptions shows additional info in some contexts](#validation-exception-info)
 - [Full list of removed and changed API (by module, alphabetically)](#api-removed-and-changed)
 
 ## Change to commercially supported modules {#changes-to-support}
@@ -1146,6 +1147,14 @@ If you were calling `getSchemaData()` in your `getAttributes()` method in a `For
 
 The related `onAfterRenewToken` extension hook has been renamed to `onAfterRenewSession`, and is triggered at the same logical step in the session renewal process.
 
+### Validation exceptions shows additional info in some contexts {#validation-exception-info}
+
+[`ValidationResult`](api:SilverStripe\Core\Validation\ValidationResult) now includes additional information about validation exceptions including the field name that failed validation, and if applicable the DataObject class and record ID. This additional information will be outputted by [`ValidationException`](api:SilverStripe\Core\Validation\ValidationException) if the validation exception happened in a CLI context, or in an HTTP context if the current controller is an instance of [`DevelopmentAdmin`](api:SilverStripe\Dev\DevelopmentAdmin) or a subclass of it.
+
+This is done to help developers debug validation issues that happen outside of a UX context more easily, such as validation exceptions that occur during a `dev/build`.
+
+The value of the field that failed validation is intentially not included in the output, as it could contain sensitive information e.g. an API token.
+
 ### Full list of removed and changed API (by module, alphabetically) {#api-removed-and-changed}
 
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