feat: Access the internal scope of Parse Server using the new maintenanceKey; the internal scope contains unofficial and undocumented fields (prefixed with underscore _) which are used internally by Parse Server; you may want to manipulate these fields for out-of-band changes such as data migration or correction tasks; changes within the internal scope of Parse Server may happen at any time without notice or changelog entry, it is therefore recommended to look at the source code of Parse Server to understand the effects of manipulating internal fields before using the key; it is discouraged to use the maintenanceKey for routine operations in a production environment; see [access scopes](https://github.com/parse-community/parse-server#access-scopes) (#8212)

BREAKING CHANGE: Fields in the internal scope of Parse Server (prefixed with underscore `_`) are only returned using the new `maintenanceKey`; previously the `masterKey` allowed reading of internal fields; see [access scopes](https://github.com/parse-community/parse-server#access-scopes) for a comparison of the keys' access permissions (#8212)

README.md

@@ -60,6 +60,7 @@ A big *thank you* 🙏 to our [sponsors](#sponsors) and [backers](#backers) who
 - [Configuration](#configuration)
   - [Basic Options](#basic-options)
   - [Client Key Options](#client-key-options)
+  - [Access Scopes](#access-scopes)
   - [Email Verification and Password Reset](#email-verification-and-password-reset)
   - [Password and Account Policy](#password-and-account-policy)
   - [Custom Routes](#custom-routes)
@@ -357,6 +358,15 @@ The client keys used with Parse are no longer necessary with Parse Server. If yo
 * `restAPIKey`
 * `dotNetKey`
 
+## Access Scopes
+
+| Scope          | Internal data | Custom data | Restricted by CLP, ACL | Key                 |
+|----------------|---------------|-------------|------------------------|---------------------|
+| Internal       | r/w           | r/w         | no                     | `maintenanceKey`    |
+| Master         | -/-           | r/w         | no                     | `masterKey`         |
+| ReadOnlyMaster | -/-           | r/-         | no                     | `readOnlyMasterKey` |
+| Session        | -/-           | r/w         | yes                    | `sessionToken`      |
+
 ## Email Verification and Password Reset
 
 Verifying user email addresses and enabling password reset via email requires an email adapter. There are many email adapters provided and maintained by the community. The following is an example configuration with an example email adapter. See the [Parse Server Options](https://parseplatform.org/parse-server/api/master/ParseServerOptions.html) for more details and a full list of available options.