diff --git a/optuna_dashboard/_serializer.py b/optuna_dashboard/_serializer.py
index 53052427..7fae23ea 100644
--- a/optuna_dashboard/_serializer.py
+++ b/optuna_dashboard/_serializer.py
@@ -107,7 +107,6 @@ def serialize_study_summary(summary: StudySummary) -> dict[str, Any]:
         "study_name": summary.study_name,
         "directions": [d.name.lower() for d in summary.directions],
         "user_attrs": serialize_attrs(summary.user_attrs),
-        "system_attrs": serialize_attrs(getattr(summary, "system_attrs", {})),
     }
 
     if summary.datetime_start is not None:
@@ -183,9 +182,6 @@ def serialize_frozen_trial(
             for param_name in fixed_params
         ],
         "user_attrs": serialize_attrs(trial.user_attrs),
-        "system_attrs": serialize_attrs(
-            {k: trial_system_attrs[k] for k in trial_system_attrs if not k.startswith("dashboard")}
-        ),
         "note": note.get_note_from_system_attrs(study_system_attrs, trial._trial_id),
         "artifacts": list_trial_artifacts(study_system_attrs, trial),
         "constraints": trial_system_attrs.get(CONSTRAINTS_KEY, []),
diff --git a/optuna_dashboard/ts/apiClient.ts b/optuna_dashboard/ts/apiClient.ts
index fc75b942..07c825d0 100644
--- a/optuna_dashboard/ts/apiClient.ts
+++ b/optuna_dashboard/ts/apiClient.ts
@@ -27,7 +27,6 @@ interface TrialResponse {
     param_external_value: string
   }[]
   user_attrs: Attribute[]
-  system_attrs: Attribute[]
   note: Note
   artifacts: Artifact[]
   constraints: number[]
@@ -50,7 +49,6 @@ const convertTrialResponse = (res: TrialResponse): Trial => {
     params: res.params,
     fixed_params: res.fixed_params,
     user_attrs: res.user_attrs,
-    system_attrs: res.system_attrs,
     note: res.note,
     artifacts: res.artifacts,
     constraints: res.constraints,
@@ -113,7 +111,6 @@ interface StudySummariesResponse {
     study_name: string
     directions: StudyDirection[]
     user_attrs: Attribute[]
-    system_attrs: Attribute[]
     datetime_start?: string
   }[]
 }
@@ -128,7 +125,6 @@ export const getStudySummariesAPI = (): Promise<StudySummary[]> => {
           study_name: study.study_name,
           directions: study.directions,
           user_attrs: study.user_attrs,
-          system_attrs: study.system_attrs,
           datetime_start: study.datetime_start
             ? new Date(study.datetime_start)
             : undefined,
@@ -143,7 +139,6 @@ interface CreateNewStudyResponse {
     study_name: string
     directions: StudyDirection[]
     user_attrs: Attribute[]
-    system_attrs: Attribute[]
     datetime_start?: string
   }
 }
@@ -165,7 +160,6 @@ export const createNewStudyAPI = (
         directions: study_summary.directions,
         // best_trial: undefined,
         user_attrs: study_summary.user_attrs,
-        system_attrs: study_summary.system_attrs,
         datetime_start: study_summary.datetime_start
           ? new Date(study_summary.datetime_start)
           : undefined,
@@ -184,7 +178,6 @@ type RenameStudyResponse = {
   study_name: string
   directions: StudyDirection[]
   user_attrs: Attribute[]
-  system_attrs: Attribute[]
   datetime_start?: string
 }
 
@@ -202,7 +195,6 @@ export const renameStudyAPI = (
         study_name: res.data.study_name,
         directions: res.data.directions,
         user_attrs: res.data.user_attrs,
-        system_attrs: res.data.system_attrs,
         datetime_start: res.data.datetime_start
           ? new Date(res.data.datetime_start)
           : undefined,
diff --git a/optuna_dashboard/ts/types/index.d.ts b/optuna_dashboard/ts/types/index.d.ts
index 040a1fc3..b27be14e 100644
--- a/optuna_dashboard/ts/types/index.d.ts
+++ b/optuna_dashboard/ts/types/index.d.ts
@@ -111,7 +111,6 @@ type Trial = {
     param_external_value: string
   }[]
   user_attrs: Attribute[]
-  system_attrs: Attribute[]
   constraints: number[]
   note: Note
   artifacts: Artifact[]
@@ -122,7 +121,6 @@ type StudySummary = {
   study_name: string
   directions: StudyDirection[]
   user_attrs: Attribute[]
-  system_attrs: Attribute[]
   datetime_start?: Date
 }