diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index fad6e947b0..fe6414ce47 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Remove deprecated `database` kwarg from `connected_to`.
+
+    *Eileen M. Uchitelle*, *John Crepezzi*
+
 *   Allow adding nonnamed expression indexes to be revertible.
 
     Fixes #40732.
diff --git a/guides/source/6_1_release_notes.md b/guides/source/6_1_release_notes.md
index bd371cac8e..a0b513aef8 100644
--- a/guides/source/6_1_release_notes.md
+++ b/guides/source/6_1_release_notes.md
@@ -235,6 +235,10 @@ Please refer to the [Changelog][active-record] for detailed changes.
 
 *   Deprecate `ActiveRecord::Base.allow_unsafe_raw_sql`.
 
+*   Deprecate `database` kwarg on `connected_to`.
+
+*   Deprecate `connection_handlers` when `legacy_connection_handling` is set to false.
+
 ### Notable changes
 
 *   MySQL: Uniqueness validator now respects default database collation,
@@ -283,6 +287,8 @@ Please refer to the [Changelog][active-record] for detailed changes.
          User.where.not(name: "Jon", role: "admin")
          # SELECT * FROM users WHERE NOT (name == 'Jon' AND role == 'admin')
 
+* To use the new per-database connection handling applications must change `legacy_connection_handling` to false and remove deprecated accessors on `connection_handlers`. Public methods for `connects_to` and `connected_to` require no changes.
+
 Active Storage
 --------------