diff --git a/weed/admin/plugin/plugin.go b/weed/admin/plugin/plugin.go
index 4a993f994..2afcffeb1 100644
--- a/weed/admin/plugin/plugin.go
+++ b/weed/admin/plugin/plugin.go
@@ -416,7 +416,10 @@ func (r *Plugin) RunDetectionWithReport(
 	if err != nil {
 		return nil, err
 	}
-	lastSuccessfulRun := r.loadLastSuccessfulRun(jobType)
+	lastCompletedRun := r.loadLastSuccessfulRun(jobType)
+	if strings.EqualFold(strings.TrimSpace(jobType), adminScriptJobType) {
+		lastCompletedRun = r.loadLastCompletedRun(jobType)
+	}
 
 	state := &pendingDetectionState{
 		complete: make(chan *plugin_pb.DetectionComplete, 1),
@@ -457,7 +460,7 @@ func (r *Plugin) RunDetectionWithReport(
 				AdminConfigValues:  adminConfigValues,
 				WorkerConfigValues: workerConfigValues,
 				ClusterContext:     clusterContext,
-				LastSuccessfulRun:  lastSuccessfulRun,
+				LastSuccessfulRun:  lastCompletedRun,
 				MaxResults:         maxResults,
 			},
 		},
@@ -1324,6 +1327,41 @@ func (r *Plugin) loadLastSuccessfulRun(jobType string) *timestamppb.Timestamp {
 	return timestamppb.New(latest.UTC())
 }
 
+func (r *Plugin) loadLastCompletedRun(jobType string) *timestamppb.Timestamp {
+	history, err := r.store.LoadRunHistory(jobType)
+	if err != nil {
+		glog.Warningf("Plugin failed to load run history for %s: %v", jobType, err)
+		return nil
+	}
+	if history == nil {
+		return nil
+	}
+
+	var latest time.Time
+	for i := range history.SuccessfulRuns {
+		completedAt := history.SuccessfulRuns[i].CompletedAt
+		if completedAt == nil || completedAt.IsZero() {
+			continue
+		}
+		if latest.IsZero() || completedAt.After(latest) {
+			latest = *completedAt
+		}
+	}
+	for i := range history.ErrorRuns {
+		completedAt := history.ErrorRuns[i].CompletedAt
+		if completedAt == nil || completedAt.IsZero() {
+			continue
+		}
+		if latest.IsZero() || completedAt.After(latest) {
+			latest = *completedAt
+		}
+	}
+	if latest.IsZero() {
+		return nil
+	}
+	return timestamppb.New(latest.UTC())
+}
+
 func CloneConfigValueMap(in map[string]*plugin_pb.ConfigValue) map[string]*plugin_pb.ConfigValue {
 	if len(in) == 0 {
 		return map[string]*plugin_pb.ConfigValue{}
diff --git a/weed/admin/plugin/plugin_detection_test.go b/weed/admin/plugin/plugin_detection_test.go
index 755ade4cd..be2aac50c 100644
--- a/weed/admin/plugin/plugin_detection_test.go
+++ b/weed/admin/plugin/plugin_detection_test.go
@@ -195,3 +195,64 @@ func TestRunDetectionWithReportCapturesDetectionActivities(t *testing.T) {
 		t.Fatalf("expected requested/proposal/completed activities, got stages=%v", stages)
 	}
 }
+
+func TestRunDetectionAdminScriptUsesLastCompletedRun(t *testing.T) {
+	pluginSvc, err := New(Options{})
+	if err != nil {
+		t.Fatalf("New plugin error: %v", err)
+	}
+	defer pluginSvc.Shutdown()
+
+	jobType := "admin_script"
+	pluginSvc.registry.UpsertFromHello(&plugin_pb.WorkerHello{
+		WorkerId: "worker-admin-script",
+		Capabilities: []*plugin_pb.JobTypeCapability{
+			{JobType: jobType, CanDetect: true, MaxDetectionConcurrency: 1},
+		},
+	})
+	session := &streamSession{workerID: "worker-admin-script", outgoing: make(chan *plugin_pb.AdminToWorkerMessage, 1)}
+	pluginSvc.putSession(session)
+
+	successCompleted := time.Date(2026, 2, 1, 10, 0, 0, 0, time.UTC)
+	errorCompleted := successCompleted.Add(45 * time.Minute)
+	if err := pluginSvc.store.AppendRunRecord(jobType, &JobRunRecord{
+		Outcome:     RunOutcomeSuccess,
+		CompletedAt: timeToPtr(successCompleted),
+	}); err != nil {
+		t.Fatalf("AppendRunRecord success run: %v", err)
+	}
+	if err := pluginSvc.store.AppendRunRecord(jobType, &JobRunRecord{
+		Outcome:     RunOutcomeError,
+		CompletedAt: timeToPtr(errorCompleted),
+	}); err != nil {
+		t.Fatalf("AppendRunRecord error run: %v", err)
+	}
+
+	errCh := make(chan error, 1)
+	go func() {
+		_, runErr := pluginSvc.RunDetection(context.Background(), jobType, &plugin_pb.ClusterContext{}, 10)
+		errCh <- runErr
+	}()
+
+	message := <-session.outgoing
+	detectRequest := message.GetRunDetectionRequest()
+	if detectRequest == nil {
+		t.Fatalf("expected run detection request message")
+	}
+	if detectRequest.LastSuccessfulRun == nil {
+		t.Fatalf("expected last_successful_run to be set")
+	}
+	if got := detectRequest.LastSuccessfulRun.AsTime().UTC(); !got.Equal(errorCompleted) {
+		t.Fatalf("unexpected last_successful_run, got=%s want=%s", got, errorCompleted)
+	}
+
+	pluginSvc.handleDetectionComplete("worker-admin-script", &plugin_pb.DetectionComplete{
+		RequestId: message.RequestId,
+		JobType:   jobType,
+		Success:   true,
+	})
+
+	if runErr := <-errCh; runErr != nil {
+		t.Fatalf("RunDetection error: %v", runErr)
+	}
+}