diff --git a/core/common.py b/core/common.py
index e3edf1b..4b2e39f 100644
--- a/core/common.py
+++ b/core/common.py
@@ -656,7 +656,9 @@ class ArmatureData(Tuple[bool,bool]):
 
 def store_breaking_settings_armature(armature: bpy.types.Object) -> ArmatureData:
     armature_data: bpy.types.Armature = armature.data
-    return (armature_data.use_mirror_x, armature.pose.use_mirror_x)
+    data: ArmatureData = (armature_data.use_mirror_x, armature.pose.use_mirror_x)
+    armature_data.use_mirror_x, armature.pose.use_mirror_x = (False, False)
+    return data
 
 def restore_breaking_settings_armature(armature: bpy.types.Object, data: ArmatureData) -> None:
     # Check if armature object is still valid (not removed)
diff --git a/functions/custom_tools/armature_merging.py b/functions/custom_tools/armature_merging.py
index 1e2cb95..f11d075 100644
--- a/functions/custom_tools/armature_merging.py
+++ b/functions/custom_tools/armature_merging.py
@@ -103,7 +103,6 @@ class AvatarToolkit_OT_MergeArmature(bpy.types.Operator):
             wm.progress_end()
 
             restore_breaking_settings_armature(base_armature, data_breaking_base)
-            
             if merge_armature_name_stored in bpy.data.objects:
                 merge_armature_obj = bpy.data.objects[merge_armature_name_stored]
                 restore_breaking_settings_armature(merge_armature_obj, data_breaking_merge)