diff --git a/internal/server/event_handlers.go b/internal/server/event_handlers.go
index 0cbd2e4f8..c3ff50f04 100644
--- a/internal/server/event_handlers.go
+++ b/internal/server/event_handlers.go
@@ -58,6 +58,9 @@ func (s *EventServer) handleEvent() func(w http.ResponseWriter, r *http.Request)
 		ctx, cancel := context.WithTimeout(r.Context(), 15*time.Second)
 		defer cancel()
 
+		// Remove any internal metadata before further processing the event.
+		excludeInternalMetadata(event)
+
 		alerts, err := s.getAllAlertsForEvent(ctx, event)
 		if err != nil {
 			eventLogger.Error(err, "failed to get alerts for the event")
@@ -440,3 +443,14 @@ func (s *EventServer) enhanceEventWithAlertMetadata(ctx context.Context, event *
 		event.Metadata = meta
 	}
 }
+
+// excludeInternalMetadata removes any internal metadata from the given event.
+func excludeInternalMetadata(event *eventv1.Event) {
+	if len(event.Metadata) == 0 {
+		return
+	}
+	excludeList := []string{eventv1.MetaTokenKey}
+	for _, key := range excludeList {
+		delete(event.Metadata, key)
+	}
+}
diff --git a/internal/server/event_handlers_test.go b/internal/server/event_handlers_test.go
index 5fe4ebf8a..0b9f7aef6 100644
--- a/internal/server/event_handlers_test.go
+++ b/internal/server/event_handlers_test.go
@@ -1058,3 +1058,35 @@ func TestEnhanceEventWithAlertMetadata(t *testing.T) {
 		})
 	}
 }
+
+func Test_excludeInternalMetadata(t *testing.T) {
+	tests := []struct {
+		name         string
+		event        eventv1.Event
+		wantMetadata map[string]string
+	}{
+		{
+			name: "no metadata",
+		},
+		{
+			name: "internal metadata",
+			event: eventv1.Event{
+				Metadata: map[string]string{
+					eventv1.MetaTokenKey:    "aaaa",
+					eventv1.MetaRevisionKey: "bbbb",
+				},
+			},
+			wantMetadata: map[string]string{
+				eventv1.MetaRevisionKey: "bbbb",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			g := NewWithT(t)
+
+			excludeInternalMetadata(&tt.event)
+			g.Expect(tt.event.Metadata).To(BeEquivalentTo(tt.wantMetadata))
+		})
+	}
+}