diff --git a/jdaviz/configs/default/plugins/gaussian_smooth/gaussian_smooth.py b/jdaviz/configs/default/plugins/gaussian_smooth/gaussian_smooth.py
index 97fb132125..cb64224a90 100644
--- a/jdaviz/configs/default/plugins/gaussian_smooth/gaussian_smooth.py
+++ b/jdaviz/configs/default/plugins/gaussian_smooth/gaussian_smooth.py
@@ -75,7 +75,16 @@ def vue_spectral_smooth(self, *args, **kwargs):
         # define a standard deviation for gaussian smoothing
         spec_smoothed = gaussian_smooth(spec, stddev=size)
 
-        label = f"Smoothed {self._selected_data.label}"
+        label = f"Smoothed {self._selected_data.label} stddev {size}"
+
+        if label in self.data_collection:
+            snackbar_message = SnackbarMessage(
+                "Data with selected stddev already exists, canceling operation.",
+                color="error",
+                sender=self)
+            self.hub.broadcast(snackbar_message)
+
+            return
 
         self.data_collection[label] = spec_smoothed
 
@@ -112,7 +121,16 @@ def vue_spatial_convolution(self, *args):
                                mask=cube.mask, meta=cube.meta,
                                fill_value=cube.fill_value)
 
-        label = f"Smoothed {self._selected_data.label}"
+        label = f"Smoothed {self._selected_data.label} spatial stddev {size}"
+
+        if label in self.data_collection:
+            snackbar_message = SnackbarMessage(
+                "Data with selected stddev already exists, canceling operation.",
+                color="error",
+                sender=self)
+            self.hub.broadcast(snackbar_message)
+
+            return
 
         self.data_collection[label] = newcube
 
diff --git a/jdaviz/configs/default/plugins/gaussian_smooth/tests/test_gaussian_smooth.py b/jdaviz/configs/default/plugins/gaussian_smooth/tests/test_gaussian_smooth.py
index 29a4eb3a0e..713e592110 100644
--- a/jdaviz/configs/default/plugins/gaussian_smooth/tests/test_gaussian_smooth.py
+++ b/jdaviz/configs/default/plugins/gaussian_smooth/tests/test_gaussian_smooth.py
@@ -20,7 +20,7 @@ def test_linking_after_spectral_smooth(spectral_cube_wcs):
     gs.vue_spectral_smooth()
 
     assert len(dc) == 2
-    assert dc[1].label == 'Smoothed test'
+    assert dc[1].label == 'Smoothed test stddev 3.2'
     assert len(dc.external_links) == 1
 
     assert dc.external_links[0].cids1[0] is dc[0].world_component_ids[0]
@@ -39,5 +39,5 @@ def test_spatial_convolution(spectral_cube_wcs):
     gs.vue_spatial_convolution()
 
     assert len(dc) == 2
-    assert dc[1].label == "Smoothed test"
-    assert dc["Smoothed test"].get_object(cls=SpectralCube).shape == (3, 4, 5)
+    assert dc[1].label == "Smoothed test spatial stddev 3.0"
+    assert dc["Smoothed test spatial stddev 3.0"].get_object(cls=SpectralCube).shape == (3, 4, 5)