diff --git a/CHANGELOG-PRERELEASE.md b/CHANGELOG-PRERELEASE.md
index cacdb22b..59ae6aaa 100644
--- a/CHANGELOG-PRERELEASE.md
+++ b/CHANGELOG-PRERELEASE.md
@@ -19,6 +19,10 @@ The format is based on [Keep a Changelog].
 - Prefab overrides on the scene are reverted on first load of the scene at first launch `#1372`
 - Animating transform with C# named properties are broken by merge bone `#1373`
   - Animator window won't create such animation but some script generates and it works surprisingly
+- Errors with blendShapes with exactly same name in a mesh `#1374`
+  - Such mesh can be generated with Autodesk Maya or 3ds Max
+  - Unity API denies generating such mesh with C# so AAO will rename such blendShapes to unique name to support.
+  - Unity Animator does animate first blendshale only so second shape would generally removed by remove unused blendShapes.
 
 ### Security
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 45f183b4..b5a150e6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,10 @@ The format is based on [Keep a Changelog].
 - Prefab overrides on the scene are reverted on first load of the scene at first launch `#1372`
 - Animating transform with C# named properties are broken by merge bone `#1373`
   - Animator window won't create such animation but some script generates and it works surprisingly
+- Errors with blendShapes with exactly same name in a mesh `#1374`
+  - Such mesh can be generated with Autodesk Maya or 3ds Max
+  - Unity API denies generating such mesh with C# so AAO will rename such blendShapes to unique name to support.
+  - Unity Animator does animate first blendshale only so second shape would generally removed by remove unused blendShapes.
 
 ### Security