diff --git a/src/bonsai/bonsai/bim/module/aggregate/operator.py b/src/bonsai/bonsai/bim/module/aggregate/operator.py
index 327c4222d3..666830b114 100644
--- a/src/bonsai/bonsai/bim/module/aggregate/operator.py
+++ b/src/bonsai/bonsai/bim/module/aggregate/operator.py
@@ -145,7 +145,6 @@ class BIM_OT_add_aggregate(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.add_aggregate"
     bl_label = "Add Aggregate"
     bl_options = {"REGISTER", "UNDO"}
-    obj: bpy.props.StringProperty()
     ifc_class: bpy.props.StringProperty(name="IFC Class", default="IfcElementAssembly")
     aggregate_name: bpy.props.StringProperty(name="Name", default="Default_Name")
 
diff --git a/src/bonsai/bonsai/bim/module/aggregate/ui.py b/src/bonsai/bonsai/bim/module/aggregate/ui.py
index 91a4e138f4..4c554b2b8d 100644
--- a/src/bonsai/bonsai/bim/module/aggregate/ui.py
+++ b/src/bonsai/bonsai/bim/module/aggregate/ui.py
@@ -78,10 +78,8 @@ class BIM_PT_aggregate(Panel):
             if AggregateData.data["has_relating_object"]:
                 row.label(text=AggregateData.data["relating_object_label"], icon="TRIA_UP")
                 op = row.operator("bim.select_aggregate", icon="OBJECT_DATA", text="")
-                op.obj = context.active_object.name
                 op.select_parts = False
                 op = row.operator("bim.select_aggregate", icon="RESTRICT_SELECT_OFF", text="")
-                op.obj = context.active_object.name
                 op.select_parts = True
                 row.operator("bim.enable_editing_aggregate", icon="GREASEPENCIL", text="")
                 row.operator("bim.add_aggregate", icon="ADD", text="")