diff --git a/problem/serializers.py b/problem/serializers.py
index a63520d..964c3b7 100644
--- a/problem/serializers.py
+++ b/problem/serializers.py
@@ -156,15 +156,6 @@ class ProblemSerializer(BaseProblemSerializer):
             "answers",
         )
 
-    def to_representation(self, instance):
-        data = super().to_representation(instance)
-        # 如果 allow_flowchart=False，则不返回 flowchart 相关字段
-        if not instance.allow_flowchart:
-            flowchart_fields = ['mermaid_code', 'flowchart_data', 'flowchart_hint', 'show_flowchart']
-            for field in flowchart_fields:
-                data.pop(field, None)
-        return data
-
 
 class ProblemListSerializer(BaseProblemSerializer):
     class Meta:
@@ -182,15 +173,6 @@ class ProblemListSerializer(BaseProblemSerializer):
             "rule_type",
         ]
 
-    def to_representation(self, instance):
-        data = super().to_representation(instance)
-        # 如果 allow_flowchart=False，则不返回 flowchart 相关字段
-        if not instance.allow_flowchart:
-            flowchart_fields = ['mermaid_code', 'flowchart_data', 'flowchart_hint', 'show_flowchart']
-            for field in flowchart_fields:
-                data.pop(field, None)
-        return data
-
 
 class ProblemSafeSerializer(BaseProblemSerializer):
     template = serializers.SerializerMethodField("get_public_template")
@@ -209,16 +191,6 @@ class ProblemSafeSerializer(BaseProblemSerializer):
             "answers",
         )
 
-    def to_representation(self, instance):
-        data = super().to_representation(instance)
-        # 如果 allow_flowchart=False，则不返回 flowchart 相关字段
-        if not instance.allow_flowchart:
-            flowchart_fields = ['mermaid_code', 'flowchart_data', 'flowchart_hint', 'show_flowchart']
-            for field in flowchart_fields:
-                data.pop(field, None)
-        return data
-
-
 class ContestProblemMakePublicSerializer(serializers.Serializer):
     id = serializers.IntegerField()
     display_id = serializers.CharField(max_length=32)