diff --git a/src/ATBAPP/DeviceControllerDiag.cpp b/src/ATBAPP/DeviceControllerDiag.cpp
index 50c951f..f276126 100644
--- a/src/ATBAPP/DeviceControllerDiag.cpp
+++ b/src/ATBAPP/DeviceControllerDiag.cpp
@@ -715,8 +715,10 @@ void DeviceControllerDiag::restartCArun()
 
 
     DCMachineEvent W255Event = DCMachineEvent(DeviceController::State::W255);
-    machineEventSet.insert(W255Event);
-    private_sendDiagEvent(W255Event, DeviceController::Action::SET);
+    if (!this->previousMachineEventSet.contains(W255Event)) {
+        machineEventSet.insert(W255Event);
+        private_sendDiagEvent(W255Event, DeviceController::Action::SET);
+    }
 
     QProcess::startDetached("/bin/systemctl", {"restart", "carun"});
 }