diff --git a/src/ansys/fluent/core/solver/flobject.py b/src/ansys/fluent/core/solver/flobject.py
index 55ec3a9421a..cb8747505bf 100644
--- a/src/ansys/fluent/core/solver/flobject.py
+++ b/src/ansys/fluent/core/solver/flobject.py
@@ -745,8 +745,7 @@ def _unalias(self, cls, value):
                                 )
                                 outer_set_states.extend(o_set_states)
                             else:
-                                ret_alias[comp] = {}
-                                ret_alias = ret_alias[comp]
+                                ret_alias = ret_alias.setdefault(comp, {})
                 else:
                     if issubclass(cls, Group):
                         ccls = cls._child_classes[k]
diff --git a/tests/test_settings_api.py b/tests/test_settings_api.py
index 14b668ca12e..e7a9efae298 100644
--- a/tests/test_settings_api.py
+++ b/tests/test_settings_api.py
@@ -217,7 +217,7 @@ def test_api_upgrade(new_solver_session, capsys):
 
 
 @pytest.mark.fluent_version(">=24.2")
-def test_deprecated_settings(new_solver_session):
+def test_deprecated_settings_with_custom_aliases(new_solver_session):
     solver = new_solver_session
     if solver.get_fluent_version() >= FluentVersion.v251:
         # https://github.com/ansys/pyfluent/issues/3134
@@ -359,6 +359,27 @@ def test_deprecated_settings(new_solver_session):
     }
 
 
+@pytest.mark.fluent_version(">=25.1")
+def test_deprecated_settings_with_settings_api_aliases(new_solver_session):
+    solver = new_solver_session
+    case_path = download_file("mixing_elbow.cas.h5", "pyfluent/mixing_elbow")
+    download_file("mixing_elbow.dat.h5", "pyfluent/mixing_elbow")
+    solver.settings.file.read_case_data(file_name=case_path)
+    solver.settings.results.surfaces.iso_clip["clip-1"] = {}
+    assert solver.settings.results.surfaces.iso_clip["clip-1"].range() == {
+        "minimum": 0,
+        "maximum": 0,
+    }
+    solver.settings.results.surfaces.iso_clip["clip-1"] = {
+        "min": -0.0001,
+        "max": 0.0001,
+    }
+    assert solver.settings.results.surfaces.iso_clip["clip-1"].range() == {
+        "minimum": -0.0001,
+        "maximum": 0.0001,
+    }
+
+
 @pytest.mark.fluent_version(">=23.1")
 def test_command_return_type(new_solver_session):
     solver = new_solver_session