diff --git a/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/CompetencyDataService.cs b/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/CompetencyDataService.cs
index 845a00b07c..76a1a199bd 100644
--- a/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/CompetencyDataService.cs
+++ b/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/CompetencyDataService.cs
@@ -615,6 +615,41 @@ FROM SelfAssessmentResults
             );
         }
 
+        public IEnumerable<SelfAssessmentResult> GetSelfAssessmentResultswithSupervisorVerificationsForDelegateSelfAssessmentCompetency(
+          int delegateUserId,
+          int selfAssessmentId,
+          int competencyId
+      )
+        {
+            return connection.Query<SelfAssessmentResult>(
+                @"SELECT
+                         s.ID,
+                        s.SelfAssessmentID,
+                        s.CompetencyID,
+                        s.AssessmentQuestionID,
+                        s.Result,
+                        s.DateTime,
+                        s.SupportingComments,
+                        s.DelegateUserId
+                    FROM SelfAssessmentResults s inner join 
+				SelfAssessmentResultSupervisorVerifications sv ON s.ID = sv.SelfAssessmentResultId AND sv.Superceded = 0 
+                    WHERE s.CompetencyID = @competencyId
+                        AND s.SelfAssessmentID = @selfAssessmentId
+                        AND s.DelegateUserID = @delegateUserId",
+                new { selfAssessmentId, delegateUserId, competencyId }
+            );
+        }
+
+        public void RemoveReviewCandidateAssessmentOptionalCompetencies(int id)
+        {
+           
+            connection.Execute(@"UPDATE SelfAssessmentResults SET Result = NULL WHERE ID =  @id", new { id});
+
+            connection.Execute(
+                     @"delete from SelfAssessmentResultSupervisorVerifications WHERE SelfAssessmentResultId = @id", new { id });
+
+        }
+
         private static string PrintResult(
             int competencyId,
             int selfAssessmentId,
diff --git a/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/SelfAssessmentDataService.cs b/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/SelfAssessmentDataService.cs
index 0528c7f907..d4b87c6f78 100644
--- a/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/SelfAssessmentDataService.cs
+++ b/DigitalLearningSolutions.Data/DataServices/SelfAssessmentDataService/SelfAssessmentDataService.cs
@@ -173,6 +173,12 @@ int GetSelfAssessmentActivityDelegatesExportCount(string searchString, string so
         bool IsCentreSelfAssessment(int selfAssessmentId, int centreId);
         bool HasMinimumOptionalCompetencies(int selfAssessmentId, int delegateUserId);
         int GetSelfAssessmentCategoryId(int selfAssessmentId);
+        void  RemoveReviewCandidateAssessmentOptionalCompetencies(int id);
+        public IEnumerable<SelfAssessmentResult> GetSelfAssessmentResultswithSupervisorVerificationsForDelegateSelfAssessmentCompetency(
+        int delegateUserId,
+        int selfAssessmentId,
+        int competencyId
+    );
     }
     public partial class SelfAssessmentDataService : ISelfAssessmentDataService
     {
diff --git a/DigitalLearningSolutions.Web/Controllers/LearningPortalController/SelfAssessment.cs b/DigitalLearningSolutions.Web/Controllers/LearningPortalController/SelfAssessment.cs
index cac172a725..2234f7d9eb 100644
--- a/DigitalLearningSolutions.Web/Controllers/LearningPortalController/SelfAssessment.cs
+++ b/DigitalLearningSolutions.Web/Controllers/LearningPortalController/SelfAssessment.cs
@@ -1532,6 +1532,22 @@ ManageOptionalCompetenciesViewModel model
                     );
                 }
             }
+            var optionalCompetency =
+            (selfAssessmentService.GetCandidateAssessmentOptionalCompetencies(selfAssessmentId, delegateUserId)).Where(x => !x.IncludedInSelfAssessment);
+            if (optionalCompetency.Any())
+            {
+                foreach (var optinal in optionalCompetency)
+                {
+                    var selfAssessmentResults = selfAssessmentService.GetSelfAssessmentResultswithSupervisorVerificationsForDelegateSelfAssessmentCompetency(delegateUserId, selfAssessmentId, optinal.Id);
+                    if (selfAssessmentResults.Any())
+                    {
+                        foreach (var item in selfAssessmentResults)
+                        {
+                            selfAssessmentService.RemoveReviewCandidateAssessmentOptionalCompetencies(item.Id);
+                        }
+                    }
+                }
+            }
             if (model.GroupOptionalCompetenciesChecked != null)
             {
                 var optionalCompetencies =
@@ -1549,7 +1565,7 @@ ManageOptionalCompetenciesViewModel model
                 }
 
             }
-
+           
             return RedirectToAction("SelfAssessmentOverview", new { selfAssessmentId, vocabulary });
         }
 
diff --git a/DigitalLearningSolutions.Web/Services/SelfAssessmentService.cs b/DigitalLearningSolutions.Web/Services/SelfAssessmentService.cs
index 37b44e8e34..ce7afea305 100644
--- a/DigitalLearningSolutions.Web/Services/SelfAssessmentService.cs
+++ b/DigitalLearningSolutions.Web/Services/SelfAssessmentService.cs
@@ -150,7 +150,17 @@ public int GetSelfAssessmentActivityDelegatesExportCount(string searchString, st
         bool IsCentreSelfAssessment(int selfAssessmentId, int centreId);
         bool HasMinimumOptionalCompetencies(int selfAssessmentId, int delegateUserId);
         public int GetSelfAssessmentCategoryId(int selfAssessmentId);
-
+        IEnumerable<SelfAssessmentResult> GetSelfAssessmentResultsForDelegateSelfAssessmentCompetency(
+           int delegateUserId,
+           int selfAssessmentId,
+           int competencyId
+       );
+        public IEnumerable<SelfAssessmentResult> GetSelfAssessmentResultswithSupervisorVerificationsForDelegateSelfAssessmentCompetency(
+        int delegateUserId,
+        int selfAssessmentId,
+        int competencyId
+    );
+       void RemoveReviewCandidateAssessmentOptionalCompetencies(int id);
     }
 
     public class SelfAssessmentService : ISelfAssessmentService
@@ -575,5 +585,25 @@ public int GetSelfAssessmentCategoryId(int selfAssessmentId)
         {
             return selfAssessmentDataService.GetSelfAssessmentCategoryId(selfAssessmentId);
         }
+        public IEnumerable<SelfAssessmentResult> GetSelfAssessmentResultsForDelegateSelfAssessmentCompetency(
+           int delegateUserId,
+           int selfAssessmentId,
+           int competencyId
+       )
+        {
+            return selfAssessmentDataService.GetSelfAssessmentResultsForDelegateSelfAssessmentCompetency(delegateUserId, selfAssessmentId, competencyId);
+        }
+        public IEnumerable<SelfAssessmentResult> GetSelfAssessmentResultswithSupervisorVerificationsForDelegateSelfAssessmentCompetency(
+        int delegateUserId,
+        int selfAssessmentId,
+        int competencyId
+    )
+        {
+            return selfAssessmentDataService.GetSelfAssessmentResultswithSupervisorVerificationsForDelegateSelfAssessmentCompetency(delegateUserId, selfAssessmentId, competencyId);
+        }
+        public void RemoveReviewCandidateAssessmentOptionalCompetencies(int id)
+        {
+             selfAssessmentDataService.RemoveReviewCandidateAssessmentOptionalCompetencies(id);
+        }
     }
 }