diff --git a/backend/api/EventHandlers/MqttEventHandler.cs b/backend/api/EventHandlers/MqttEventHandler.cs
index 020ed71fd..99bbd9b71 100644
--- a/backend/api/EventHandlers/MqttEventHandler.cs
+++ b/backend/api/EventHandlers/MqttEventHandler.cs
@@ -206,7 +206,10 @@ private async void OnMissionUpdate(object? sender, MqttReceivedArgs mqttArgs)
                 return;
             }
 
-            var flotillaMissionRun = await missionRunService.UpdateMissionRunStatusByIsarMissionId(isarMission.MissionId, status);
+            MissionRun? flotillaMissionRun;
+            try { flotillaMissionRun = await missionRunService.UpdateMissionRunStatusByIsarMissionId(isarMission.MissionId, status); }
+            catch (MissionRunNotFoundException) { return; }
+
             if (flotillaMissionRun is null)
             {
                 _logger.LogError("No mission found with ISARMissionId '{IsarMissionId}'. Could not update status to '{Status}'", isarMission.MissionId, status);
diff --git a/backend/api/Services/MissionRunService.cs b/backend/api/Services/MissionRunService.cs
index 67f7c7b36..0e738ae45 100644
--- a/backend/api/Services/MissionRunService.cs
+++ b/backend/api/Services/MissionRunService.cs
@@ -4,10 +4,8 @@
 using Api.Database.Context;
 using Api.Database.Models;
 using Api.Services.Events;
-using Api.Services.Models;
 using Api.Utilities;
 using Microsoft.EntityFrameworkCore;
-using TaskStatus = Api.Database.Models.TaskStatus;
 namespace Api.Services
 {
     public interface IMissionRunService
@@ -321,19 +319,14 @@ MissionRunQueryStringParameters parameters
                 );
         }
 
-        public async Task<MissionRun?> UpdateMissionRunStatusByIsarMissionId(
-            string isarMissionId,
-            MissionStatus missionStatus
-        )
+        public async Task<MissionRun?> UpdateMissionRunStatusByIsarMissionId(string isarMissionId, MissionStatus missionStatus)
         {
             var missionRun = await ReadByIsarMissionId(isarMissionId);
             if (missionRun is null)
             {
-                _logger.LogWarning(
-                    "Could not update mission status for ISAR mission with id: {id} as the mission was not found",
-                    isarMissionId
-                );
-                return null;
+                string errorMessage = $"Mission with isar mission Id {isarMissionId} was not found";
+                _logger.LogError("{Message}", errorMessage);
+                throw new MissionRunNotFoundException(errorMessage);
             }
 
             missionRun.Status = missionStatus;
diff --git a/backend/api/Utilities/Exceptions.cs b/backend/api/Utilities/Exceptions.cs
index 38b3c8ee0..2897d38c1 100644
--- a/backend/api/Utilities/Exceptions.cs
+++ b/backend/api/Utilities/Exceptions.cs
@@ -61,6 +61,11 @@ public class MissionTaskNotFoundException : Exception
         public MissionTaskNotFoundException(string message) : base(message) { }
     }
 
+    public class MissionRunNotFoundException : Exception
+    {
+        public MissionRunNotFoundException(string message) : base(message) { }
+    }
+
     public class RobotPositionNotFoundException : Exception
     {
         public RobotPositionNotFoundException(string message) : base(message) { }