diff --git a/moonshot-api/src/main/java/org/moonshot/objective/dto/response/social/SocialKeyResultDto.java b/moonshot-api/src/main/java/org/moonshot/objective/dto/response/social/SocialKeyResultDto.java
index 25607e8..69dd669 100644
--- a/moonshot-api/src/main/java/org/moonshot/objective/dto/response/social/SocialKeyResultDto.java
+++ b/moonshot-api/src/main/java/org/moonshot/objective/dto/response/social/SocialKeyResultDto.java
@@ -28,7 +28,7 @@ private static SocialKeyResultDto getSocialKeyResultDto(KeyResult keyResult) {
                 keyResult.getIdx(),
                 keyResult.getTarget(),
                 keyResult.getMetric(),
-                keyResult.getTaskList().stream().map(SocialTaskDto::of).toList()
+                keyResult.getTaskList().stream().distinct().map(SocialTaskDto::of).toList()
         );
     }
 }
diff --git a/moonshot-api/src/main/java/org/moonshot/objective/dto/response/social/SocialObjectiveDto.java b/moonshot-api/src/main/java/org/moonshot/objective/dto/response/social/SocialObjectiveDto.java
index d7bcebc..ad7e0f6 100644
--- a/moonshot-api/src/main/java/org/moonshot/objective/dto/response/social/SocialObjectiveDto.java
+++ b/moonshot-api/src/main/java/org/moonshot/objective/dto/response/social/SocialObjectiveDto.java
@@ -20,7 +20,7 @@ public static SocialObjectiveDto of(Objective objective) {
                 objective.getContent(),
                 objective.getPeriod().getStartAt().format(DateTimeFormatter.ISO_LOCAL_DATE),
                 objective.getPeriod().getExpireAt().format(DateTimeFormatter.ISO_LOCAL_DATE),
-                objective.getKeyResultList().stream().map(SocialKeyResultDto::of).toList()
+                objective.getKeyResultList().stream().distinct().map(SocialKeyResultDto::of).toList()
         );
     }
 }