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diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index a23981a22b..b8956034d9 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,28 @@
+*   PostgreSQL adapter only warns once for every missing OID per connection.
+
+    Fixes #14275.
+
+    *Matthew Draper*, *Yves Senn*
+
+*   PostgreSQL adapter automatically reloads it's type map when encountering
+    unknown OIDs.
+
+    Fixes #14678.
+
+    *Matthew Draper*, *Yves Senn*
+
+*   Fix insertion of records via `has_many :through` association with scope.
+
+    Fixes #3548.
+
+    *Ivan Antropov*
+
+*   Auto-generate stable fixture UUIDs on PostgreSQL.
+
+    Fixes: #11524
+
+    *Roderick van Domburg*
+
 *   Fixed a problem where an enum would overwrite values of another enum
     with the same name in an unrelated class.