diff --git a/DigitalLearningSolutions.Data/DataServices/CourseDataService.cs b/DigitalLearningSolutions.Data/DataServices/CourseDataService.cs
index 9f0ab58aec..9e3addf30f 100644
--- a/DigitalLearningSolutions.Data/DataServices/CourseDataService.cs
+++ b/DigitalLearningSolutions.Data/DataServices/CourseDataService.cs
@@ -542,7 +542,7 @@ LEFT OUTER JOIN UserCentreDetails AS UCD ON
                         new { candidateAssessmentId, enrolmentMethodId, completeByDateDynamic }
                     );
             }
-            if (candidateAssessmentId > 1 && supervisorDelegateId !=0)
+            if (candidateAssessmentId > 1 && supervisorDelegateId != 0)
             {
                 string sqlQuery = $@"
                 BEGIN TRANSACTION
@@ -551,17 +551,17 @@ BEGIN TRANSACTION
 
                 UPDATE CandidateAssessmentSupervisors SET Removed = NULL
                  {((selfAssessmentSupervisorRoleId > 0) ? " ,SelfAssessmentSupervisorRoleID = @selfAssessmentSupervisorRoleID" : string.Empty)}
-                WHERE CandidateAssessmentID = @candidateAssessmentId
+                WHERE CandidateAssessmentID = @candidateAssessmentId AND SupervisorDelegateId = @supervisorDelegateId 
 
                 COMMIT TRANSACTION";
 
                 connection.Execute(sqlQuery
-                , new { candidateAssessmentId, selfAssessmentSupervisorRoleId, enrolmentMethodId, completeByDateDynamic });
+                , new { candidateAssessmentId, selfAssessmentSupervisorRoleId, enrolmentMethodId, completeByDateDynamic, supervisorDelegateId });
             }
 
             if (supervisorId > 0)
             {
-                
+
                 var adminUserId = Convert.ToInt32(connection.ExecuteScalar(@"SELECT UserID FROM AdminAccounts WHERE (AdminAccounts.ID = @supervisorId)",
                     new { supervisorId })
                     );