diff --git a/backend/benefit/applications/api/v1/serializers/application_alteration.py b/backend/benefit/applications/api/v1/serializers/application_alteration.py
index 5bb54022cc..a28a7a3e45 100644
--- a/backend/benefit/applications/api/v1/serializers/application_alteration.py
+++ b/backend/benefit/applications/api/v1/serializers/application_alteration.py
@@ -191,6 +191,7 @@ def _validate_date_range_overlaps(self, self_id, application, start_date, end_da
             if (
                 alteration.recovery_start_date is None
                 or alteration.recovery_end_date is None
+                or alteration.state == ApplicationAlterationState.CANCELLED
             ):
                 continue
 
@@ -255,9 +256,15 @@ def validate(self, data):
             application, alteration_start_date, alteration_end_date
         )
 
-        if alteration_end_date is not None:
+        if (
+            alteration_end_date is not None
+            and merged_data["state"] != ApplicationAlterationState.CANCELLED
+        ):
             errors += self._validate_date_range_overlaps(
-                self_id, application, alteration_start_date, alteration_end_date
+                self_id,
+                application,
+                merged_data["recovery_start_date"] or alteration_start_date,
+                merged_data["recovery_end_date"] or alteration_end_date,
             )
 
         if len(errors) > 0:
diff --git a/frontend/benefit/handler/src/components/alterationHandling/useAlterationHandlingForm.ts b/frontend/benefit/handler/src/components/alterationHandling/useAlterationHandlingForm.ts
index 5d25b19394..7d8ebbd0ca 100644
--- a/frontend/benefit/handler/src/components/alterationHandling/useAlterationHandlingForm.ts
+++ b/frontend/benefit/handler/src/components/alterationHandling/useAlterationHandlingForm.ts
@@ -105,7 +105,7 @@ const useAlterationHandling = ({
     isSubmitting: updateStatus === 'loading',
     t,
     formik,
-    handleAlteration: () => void formik.submitForm,
+    handleAlteration: () => void formik.submitForm(),
     validateForm,
   };
 };