diff --git a/src/bonsai/bonsai/bim/module/geometry/operator.py b/src/bonsai/bonsai/bim/module/geometry/operator.py
index 6485856669..2d004c6b36 100644
--- a/src/bonsai/bonsai/bim/module/geometry/operator.py
+++ b/src/bonsai/bonsai/bim/module/geometry/operator.py
@@ -1320,7 +1320,7 @@ class DuplicateMoveLinkedAggregate(bpy.types.Operator):
                     )
                     pset = ifcopenshell.util.element.get_pset(new[0], "BBIM_Linked_Aggregate")
                     new_obj = tool.Ifc.get_object(new[0])
-                    new_obj.name = pset["Name"] + "_" + str(pset["Aggregate_Index"])
+                    new_obj.name = f"{pset['Name']}_{pset['Aggregate_Index']:02d}"
 
         def get_max_index(parts):
             psets = [
diff --git a/src/bonsai/test/bim/feature/geometry.feature b/src/bonsai/test/bim/feature/geometry.feature
index 7966af5ffa..ee2851fc7e 100644
--- a/src/bonsai/test/bim/feature/geometry.feature
+++ b/src/bonsai/test/bim/feature/geometry.feature
@@ -579,8 +579,9 @@ Scenario: Duplicate linked aggregate
     When I duplicate linked aggregate the selected objects
     Then the object "IfcWall/Wall_01.001" exists
     And the object "IfcWall/Wall_02.001" exists
-    And the object "IfcElementAssembly/Assembly_01" exists
-    Then the object "IfcElementAssembly/Assembly" and "IfcElementAssembly/Assembly_01" belong to the same Linked Aggregate Group
+    # msgbus updates don't happen in background mode, so obj is not renamed to "IfcElementAssembly/Assembly_01"
+    And the object "Assembly_01" exists
+    Then the object "IfcElementAssembly/Assembly" and "Assembly_01" belong to the same Linked Aggregate Group
 
 Scenario: Refresh linked aggregate
     Given I load the IFC test file "/test/files/linked-aggregates.ifc"