diff --git a/modules/planning/common/frame.cc b/modules/planning/common/frame.cc
index 3664ca4cdc4633df8f6406826aecb7190fd73cae..ae8ff1467c7eb3a3a01dd2649dbf02b6f25a9b5c 100644
--- a/modules/planning/common/frame.cc
+++ b/modules/planning/common/frame.cc
@@ -493,11 +493,6 @@ void Frame::RecordInputDebug(planning_internal::Debug *debug) {
   */
 }
 
-void Frame::RecordOpenSpacePlannerDebug(planning_internal::Debug *debug) {
-  auto *planning_debug_data = debug->mutable_planning_data();
-  planning_debug_data->mutable_open_space()->CopyFrom(*open_space_debug_);
-}
-
 void Frame::AlignPredictionTime(const double planning_start_time,
                                 PredictionObstacles *prediction_obstacles) {
   if (!prediction_obstacles || !prediction_obstacles->has_header() ||
diff --git a/modules/planning/common/frame.h b/modules/planning/common/frame.h
index f799d98e89025bac91905d50bba7baeaf8c8be8f..2ff7a1c68a1a2ef4ea52dc9a7f5b7a8deb8612fd 100644
--- a/modules/planning/common/frame.h
+++ b/modules/planning/common/frame.h
@@ -133,8 +133,11 @@ class Frame {
 
   ADCTrajectory *output_trajectory() { return output_trajectory_; }
 
-  std::shared_ptr<planning_internal::OpenSpaceDebug>
-  mutable_open_space_debug() {
+  planning_internal::OpenSpaceDebug *mutable_open_space_debug() {
+    return &open_space_debug_;
+  }
+
+  const planning_internal::OpenSpaceDebug &open_space_debug() {
     return open_space_debug_;
   }
 
@@ -194,14 +197,13 @@ class Frame {
   ThreadSafeIndexedObstacles obstacles_;
   ChangeLaneDecider change_lane_decider_;
   ADCTrajectory trajectory_;  // last published trajectory
+  // debug info for open space planner
+  planning_internal::OpenSpaceDebug open_space_debug_;
 
   // TODO(all): change to use shared_ptr.
   // output trajectory pb
   ADCTrajectory *output_trajectory_ = nullptr;  // not owned
 
-  // debug info for open space planner
-  std::shared_ptr<planning_internal::OpenSpaceDebug> open_space_debug_;
-
   // TODO(All): add lag_predictor back
   // std::unique_ptr<LagPrediction> lag_predictor_;
   const ReferenceLineProvider *reference_line_provider_ = nullptr;