diff --git a/CHANGELOG-PRERELEASE.md b/CHANGELOG-PRERELEASE.md
index f344edb4..aae4cc7a 100644
--- a/CHANGELOG-PRERELEASE.md
+++ b/CHANGELOG-PRERELEASE.md
@@ -10,6 +10,9 @@ The format is based on [Keep a Changelog].
 ### Added
 
 ### Changed
+- Make error for MergeBone with MergePB rotation mode fix `#1345`
+  - This was not working as expected in previous version so I made this error.
+  - We may add support or change behavior in the future release
 
 ### Deprecated
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 58438b8b..7ca6bd53 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -55,7 +55,7 @@ The format is based on [Keep a Changelog].
   - AAO 1.8.0 introduced BlendShape support for Merge Skinned Mesh, but new default mode "Rename to avoid conflicts" would increase number of BlendShape.
   - This feature is added to relax this problem by automatically merging multiple BlendShapes of one Mesh.
   - With this feature, you can use rename mode without performance loss.
-- Fix mode for PhysBone Limits in Merge PhysBone `#665` `#1336`
+- Fix mode for PhysBone Limits in Merge PhysBone `#665` `#1336` `#1345`
   - In addition to existing `Copy` and `Override`, we added `Fix` mode.
   - This mode will try to correct roll axis by rotating bone.
   - This feature allows you to configure the mode for PhysBone Limits in Merge PhysBone.
diff --git a/Editor/Processors/MergePhysBoneProcessor.cs b/Editor/Processors/MergePhysBoneProcessor.cs
index 3dac5e45..f039c2fd 100644
--- a/Editor/Processors/MergePhysBoneProcessor.cs
+++ b/Editor/Processors/MergePhysBoneProcessor.cs
@@ -149,13 +149,18 @@ internal static void DoMerge(MergePhysBone merge, BuildContext? context)
                     }
                 }
 
-                var newIgnores = new List<Transform>();
+                var originalBones = new List<Transform>();
                 // fix rotations
                 foreach (var physBone in sourceComponents)
-                    FixYawPitch(physBone, root, context, newIgnores);
+                    FixYawPitch(physBone, root, context, originalBones);
+
+                if (originalBones.Any(x => x.GetComponent<MergeBone>()))
+                {
+                    BuildLog.LogError("MergePhysBone:error:limit-rotation-fix-merge-bone");
+                }
 
                 // fix configurations
-                merged.ignoreTransforms = merged.ignoreTransforms.Concat(newIgnores).ToList();
+                merged.ignoreTransforms = merged.ignoreTransforms.Concat(originalBones).ToList();
 
                 var sourceComponent = sourceComponents[0];
                 var chainLength = sourceComponent.BoneChainLength();
@@ -236,7 +241,7 @@ public static void FixYawPitch(
             VRCPhysBoneBase physBone,
             Transform root, 
             BuildContext? context,
-            List<Transform> newIgnores)
+            List<Transform> originalBones)
         {
             // Already fixed; nothing to do!
             if (physBone.limitRotation.Equals(Vector3.zero)) return;
@@ -246,7 +251,7 @@ public static void FixYawPitch(
 
             var ignoreTransforms = new HashSet<Transform>(physBone.ignoreTransforms);
 
-            RotateRecursive(physBone, physBone.GetTarget(), root, maxChainLength, 0, ignoreTransforms, newIgnores);
+            RotateRecursive(physBone, physBone.GetTarget(), root, maxChainLength, 0, ignoreTransforms, originalBones);
         }
 
         /*
@@ -293,7 +298,7 @@ private static void RotateRecursive(VRCPhysBoneBase physBone,
             int totalDepth,
             int depth,
             HashSet<Transform> ignoreTransforms,
-            List<Transform> newIgnores)
+            List<Transform> originalBones)
         {
             Vector3 targetLocation;
 
@@ -365,7 +370,7 @@ private static void RotateRecursive(VRCPhysBoneBase physBone,
             // move old bone to child of newBone
             transform.SetParent(newBone.transform, true);
 
-            newIgnores.Add(transform);
+            originalBones.Add(transform);
 
             //var rotationQuaternion = Quaternion.Euler(0, -thisRotation, 0);
 
@@ -375,7 +380,7 @@ private static void RotateRecursive(VRCPhysBoneBase physBone,
                 //child.localRotation = rotationQuaternion * child.localRotation;
                 
                 if (ignoreTransforms.Contains(child)) continue;
-                RotateRecursive(physBone, child, newBone.transform, totalDepth, depth + 1, ignoreTransforms, newIgnores);
+                RotateRecursive(physBone, child, newBone.transform, totalDepth, depth + 1, ignoreTransforms, originalBones);
             }
         }
 
diff --git a/Localization/en-us.po b/Localization/en-us.po
index a8ac3669..a2aa9b11 100644
--- a/Localization/en-us.po
+++ b/Localization/en-us.po
@@ -278,6 +278,9 @@ msgstr "Components"
 msgid "MergePhysBone:warning:limit-rotation-fix-animation"
 msgstr "Limit Rotation mode is Fix but physBone affected transforms are animated."
 
+msgid "MergePhysBone:warning:limit-rotation-fix-animation"
+msgstr "Merge Bone on PhysBone for Merge PhysBone with Limit Rotation mode Fix does not work and completely unsupported."
+
 msgid "MergePhysBone:warning:limit-rotation-fix-animation:description"
 msgstr "This is not supported with Limit Rotation mode Fix for now."