diff --git a/autoware_launch/config/system/system_error_monitor/system_error_monitor.planning_simulation.param.yaml b/autoware_launch/config/system/system_error_monitor/system_error_monitor.planning_simulation.param.yaml
index 522dbb51ee..3fd6264376 100644
--- a/autoware_launch/config/system/system_error_monitor/system_error_monitor.planning_simulation.param.yaml
+++ b/autoware_launch/config/system/system_error_monitor/system_error_monitor.planning_simulation.param.yaml
@@ -39,7 +39,7 @@
         /autoware/system/emergency_stop_operation: default
         /autoware/system/service_log_checker: { sf_at: "warn", lf_at: "none", spf_at: "none" }
         # /autoware/system/resource_monitoring: { sf_at: "warn", lf_at: "error", spf_at: "none" }
-        # /autoware/system/duplicated_node_checker: default
+        /autoware/system/duplicated_node_checker: default
 
         /autoware/vehicle/node_alive_monitoring: default