diff --git a/taiga/projects/tasks/signals.py b/taiga/projects/tasks/signals.py
index 03e65ddd..bdc622e9 100644
--- a/taiga/projects/tasks/signals.py
+++ b/taiga/projects/tasks/signals.py
@@ -61,11 +61,12 @@ def _try_to_close_or_open_us_when_create_or_edit_task(instance):
 def _try_to_close_or_open_us_when_delete_task(instance):
     from taiga.projects.userstories import services as us_service
 
-    if instance.user_story_id:
-        if us_service.calculate_userstory_is_closed(instance.user_story):
-            us_service.close_userstory(instance.user_story)
-        else:
-            us_service.open_userstory(instance.user_story)
+    with suppress(ObjectDoesNotExist):
+        if instance.user_story_id:
+            if us_service.calculate_userstory_is_closed(instance.user_story):
+                us_service.close_userstory(instance.user_story)
+            else:
+                us_service.open_userstory(instance.user_story)
 
 
 # Milestone
diff --git a/taiga/projects/userstories/signals.py b/taiga/projects/userstories/signals.py
index c1b491a8..f728b372 100644
--- a/taiga/projects/userstories/signals.py
+++ b/taiga/projects/userstories/signals.py
@@ -14,6 +14,8 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from contextlib import suppress
+from django.core.exceptions import ObjectDoesNotExist
 
 ####################################
 # Signals for cached prev US
@@ -87,5 +89,6 @@ def _try_to_close_or_open_milestone_when_create_or_edit_us(instance):
 def _try_to_close_milestone_when_delete_us(instance):
     from taiga.projects.milestones import services as milestone_service
 
-    if instance.milestone_id and milestone_service.calculate_milestone_is_closed(instance.milestone):
-            milestone_service.close_milestone(instance.milestone)
+    with suppress(ObjectDoesNotExist):
+        if instance.milestone_id and milestone_service.calculate_milestone_is_closed(instance.milestone):
+                milestone_service.close_milestone(instance.milestone)