diff --git a/developer_manual/release_notes/critical_changes.rst b/developer_manual/release_notes/critical_changes.rst
index 8a520e61303..3401c3006f9 100644
--- a/developer_manual/release_notes/critical_changes.rst
+++ b/developer_manual/release_notes/critical_changes.rst
@@ -70,15 +70,28 @@ Removed front-end APIs and libraries
 Removed back-end APIs
 ---------------------
 
-- All these interfaces were deprecated since Nextcloud 23 and were removed without replacement:
-  - ``\OCP\Remote\ICredentials``
-  - ``\OCP\Remote\IInstance``
-  - ``\OCP\Remote\IInstanceFactory``
-  - ``\OCP\Remote\IUser``
-  - ``\OCP\Remote\API\IUserApi``
-  - ``\OCP\Remote\API\ICapabilitiesApi``
-  - ``\OCP\Remote\API\IApiFactory``
-  - ``\OCP\Remote\API\IApiCollection``
+Remote API
+^^^^^^^^^^
+
+All these interfaces were deprecated since Nextcloud 23 and were removed without replacement:
+
+- ``\OCP\Remote\ICredentials``
+- ``\OCP\Remote\IInstance``
+- ``\OCP\Remote\IInstanceFactory``
+- ``\OCP\Remote\IUser``
+- ``\OCP\Remote\API\IUserApi``
+- ``\OCP\Remote\API\ICapabilitiesApi``
+- ``\OCP\Remote\API\IApiFactory``
+- ``\OCP\Remote\API\IApiCollection``
+
+Preview API
+^^^^^^^^^^^
+
+The registration method of the preview manager ``\OCP\IPreview::registerProvider`` was deprecated since Nextcloud 23 and was removed now.
+Instead of using the manager register your provider via the ``IRegistrationContext`` when booting the app.
+
+Other removed back-end APIs
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 - All the deprecated methods of ``\OCP\Calendar\Resource\IManager`` and ``\OCP\Calendar\Room\IManager`` were deprecated since Nextcloud 24 and were removed without replacement.
 - The ``\OCP\Collaboration\AutoComplete\AutoCompleteEvent`` event was deprecated since Nextcloud 28 and was removed with ``OCP\Collaboration\AutoComplete\AutoCompleteFilterEvent`` as replacement;