remove the orphaned data created on object duplicate

orphaned mesh still had ifc_definition_id of the original object and could have caused issues in theory

src/blenderbim/blenderbim/bim/module/geometry/operator.py

@@ -689,8 +689,11 @@ class OverrideDuplicateMove(bpy.types.Operator):
                 blenderbim.core.geometry.edit_object_placement(tool.Ifc, tool.Geometry, tool.Surveyor, obj=obj)
 
             new_obj = obj.copy()
+            temp_data = None
             if obj.data:
-                new_obj.data = obj.data.copy()
+                # assure root.copy_class won't replace the previous mesh globally
+                temp_data = obj.data.copy()
+                new_obj.data = temp_data
             if obj == context.active_object:
                 self.new_active_obj = new_obj
             for collection in obj.users_collection:
@@ -699,8 +702,13 @@ class OverrideDuplicateMove(bpy.types.Operator):
             new_obj.select_set(True)
             # clear object's collection so it will be able to have it's own
             new_obj.BIMObjectProperties.collection = None
-            # Copy the actual class
+            # copy the actual class
             new = blenderbim.core.root.copy_class(tool.Ifc, tool.Collector, tool.Geometry, tool.Root, obj=new_obj)
+
+            # clean up the orphaned mesh with ifc id of the original object to avoid confusion
+            if temp_data:
+                tool.Blender.remove_data_block(temp_data)
+
             if new:
                 array_pset = ifcopenshell.util.element.get_pset(new, "BBIM_Array")
                 if array_pset:

src/blenderbim/blenderbim/tool/blender.py

@@ -387,6 +387,11 @@ class Blender:
             getattr(data_to, data_block_type).append(name)
         return {"data_block": getattr(data_to, data_block_type)[0], "msg": ""}
 
+    @classmethod
+    def remove_data_block(cls, data_block):
+        collection_name = repr(data_block).split(".", 2)[-1].split("[", 1)[0]
+        getattr(bpy.data, collection_name).remove(data_block)
+
     ## BMESH UTILS ##
     @classmethod
     def apply_bmesh(cls, mesh, bm, obj=None):