diff --git a/src/main/java/foregg/foreggserver/converter/NotificationConverter.java b/src/main/java/foregg/foreggserver/converter/NotificationConverter.java
index 70809b33..13b3ff0a 100644
--- a/src/main/java/foregg/foreggserver/converter/NotificationConverter.java
+++ b/src/main/java/foregg/foreggserver/converter/NotificationConverter.java
@@ -11,21 +11,21 @@
 
 public class NotificationConverter {
 
-    public static List<NotificationDTO> fromReplyToNotification(List<Reply> replyList) {
-        List<NotificationDTO> result = new ArrayList<>();
-        for (Reply reply : replyList) {
-            NotificationDTO dto = NotificationDTO.builder()
-                    .id(reply.getId())
-                    .targetKey(reply.getDaily().getDate())
-                    .notificationType(NotificationType.REPLY)
-                    .sender(reply.getSender().getNickname())
-                    .elapsedTime(DateUtil.getElapsedTime(reply.getCreatedAt()))
-                    .createdAt(reply.getCreatedAt().toString())
-                    .build();
-            result.add(dto);
-        }
-        return result;
-    }
+//    public static List<NotificationDTO> fromReplyToNotification(List<Reply> replyList) {
+//        List<NotificationDTO> result = new ArrayList<>();
+//        for (Reply reply : replyList) {
+//            NotificationDTO dto = NotificationDTO.builder()
+//                    .id(reply.getId())
+//                    .targetKey(reply.getDaily().getDate())
+//                    .notificationType(NotificationType.REPLY)
+//                    .sender(reply.getSender().getNickname())
+//                    .elapsedTime(DateUtil.getElapsedTime(reply.getCreatedAt()))
+//                    .createdAt(reply.getCreatedAt().toString())
+//                    .build();
+//            result.add(dto);
+//        }
+//        return result;
+//    }
 
     public static List<NotificationDTO> toNotificationResponse(List<Notification> notificationList) {
         List<NotificationDTO> result = new ArrayList<>();
diff --git a/src/main/java/foregg/foreggserver/domain/Reply.java b/src/main/java/foregg/foreggserver/domain/Reply.java
index 7b0c8962..3e020240 100644
--- a/src/main/java/foregg/foreggserver/domain/Reply.java
+++ b/src/main/java/foregg/foreggserver/domain/Reply.java
@@ -30,12 +30,10 @@ public class Reply extends BaseEntity {
     @JoinColumn(name = "daily_id")
     private Daily daily;
 
-    @ManyToOne(fetch = FetchType.LAZY)
-    @JoinColumn(name = "receiver")
-    private User receiver;
+    @Column(nullable = false)
+    private Long receiverId;
 
-    @ManyToOne(fetch = FetchType.LAZY)
-    @JoinColumn(name = "sender")
-    private User sender;
+    @Column(nullable = false)
+    private Long senderId;
 
 }
diff --git a/src/main/java/foregg/foreggserver/domain/User.java b/src/main/java/foregg/foreggserver/domain/User.java
index a0919d52..d015e055 100644
--- a/src/main/java/foregg/foreggserver/domain/User.java
+++ b/src/main/java/foregg/foreggserver/domain/User.java
@@ -92,9 +92,6 @@ public class User extends BaseEntity implements UserDetails {
     @OneToMany(mappedBy = "user", cascade = CascadeType.ALL, orphanRemoval = true)
     private List<LedgerMemo> ledgerMemos;
 
-    @OneToMany(mappedBy = "receiver", cascade = CascadeType.ALL, orphanRemoval = true)
-    private List<Reply> replies;
-
     // Jwt 전용 설정 (UserDetails 인터페이스 구현)
 
     @ElementCollection(fetch = FetchType.EAGER) //roles 컬렉션
diff --git a/src/main/java/foregg/foreggserver/repository/ReplyRepository.java b/src/main/java/foregg/foreggserver/repository/ReplyRepository.java
index 8558c6c9..f2cc3e2b 100644
--- a/src/main/java/foregg/foreggserver/repository/ReplyRepository.java
+++ b/src/main/java/foregg/foreggserver/repository/ReplyRepository.java
@@ -7,6 +7,6 @@
 
 public interface ReplyRepository extends JpaRepository<Reply, Long> {
 
-    List<Reply> findByReceiver(User user);
+    List<Reply> findByReceiverId(Long receiverId);
 
 }
diff --git a/src/main/java/foregg/foreggserver/service/challengeService/ChallengeService.java b/src/main/java/foregg/foreggserver/service/challengeService/ChallengeService.java
index 3315c78f..62585310 100644
--- a/src/main/java/foregg/foreggserver/service/challengeService/ChallengeService.java
+++ b/src/main/java/foregg/foreggserver/service/challengeService/ChallengeService.java
@@ -184,7 +184,7 @@ public void cheer(Long receiverId, NotificationType type, Long challengeId) {
             throw new ChallengeHandler(NO_MORE_THAN_THIRD_TIME);
         }
 
-        if (notificationRepository.findBySenderAndReceiverAndDateAndNotificationType(sender.getChallengeName(), receiver, LocalDate.now().toString(), type) != null) {
+        if (notificationRepository.findBySenderAndReceiverAndDateAndNotificationTypeAndTargetId(sender.getChallengeName(), receiver, LocalDate.now().toString(), type, challengeId) != null) {
             throw new ChallengeHandler(ALREADY_SEND_CHEER);
         }
 
diff --git a/src/main/java/foregg/foreggserver/service/dailyService/DailyService.java b/src/main/java/foregg/foreggserver/service/dailyService/DailyService.java
index 2b5162da..f1c6f838 100644
--- a/src/main/java/foregg/foreggserver/service/dailyService/DailyService.java
+++ b/src/main/java/foregg/foreggserver/service/dailyService/DailyService.java
@@ -96,8 +96,8 @@ public void reply(DailyReplyRequestDTO dto) {
                 .content(dto.getContent())
                 .replyEmojiType(dto.getReplyEmojiType())
                 .daily(daily)
-                .receiver(wife)
-                .sender(userQueryService.getUser())
+                .receiverId(wife.getId())
+                .senderId(userQueryService.getUser().getId())
                 .build();
         replyRepository.save(reply);
         daily.setReply(reply);
diff --git a/src/main/java/foregg/foreggserver/service/notificationService/NotificationQueryService.java b/src/main/java/foregg/foreggserver/service/notificationService/NotificationQueryService.java
index 9663144c..36546593 100644
--- a/src/main/java/foregg/foreggserver/service/notificationService/NotificationQueryService.java
+++ b/src/main/java/foregg/foreggserver/service/notificationService/NotificationQueryService.java
@@ -5,12 +5,15 @@
 import foregg.foreggserver.domain.Notification;
 import foregg.foreggserver.domain.Reply;
 import foregg.foreggserver.domain.User;
+import foregg.foreggserver.domain.enums.NotificationType;
 import foregg.foreggserver.dto.notificationDTO.NotificationResponseDTO;
 import foregg.foreggserver.dto.notificationDTO.NotificationResponseDTO.NotificationDTO;
 import foregg.foreggserver.jwt.SecurityUtil;
 import foregg.foreggserver.repository.NotificationRepository;
 import foregg.foreggserver.repository.ReplyRepository;
+import foregg.foreggserver.repository.UserRepository;
 import foregg.foreggserver.service.userService.UserQueryService;
+import foregg.foreggserver.util.DateUtil;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -29,6 +32,7 @@
 public class NotificationQueryService {
 
     private final ReplyRepository replyRepository;
+    private final UserRepository userRepository;
     private final UserQueryService userQueryService;
     private final NotificationRepository notificationRepository;
 
@@ -39,7 +43,7 @@ public NotificationResponseDTO getNotificationHistory(int page) {
         User user = userQueryService.getUser();
 
         // 필터링된 Reply 리스트
-        List<Reply> replyList = replyRepository.findByReceiver(user).stream()
+        List<Reply> replyList = replyRepository.findByReceiverId(user.getId()).stream()
                 .filter(reply -> reply.getCreatedAt().isAfter(thresholdDate))
                 .toList();
 
@@ -49,7 +53,7 @@ public NotificationResponseDTO getNotificationHistory(int page) {
                 .toList();
 
         // 결과 생성
-        result.addAll(NotificationConverter.fromReplyToNotification(replyList));
+        result.addAll(this.fromReplyToNotification(replyList));
         result.addAll(NotificationConverter.toNotificationResponse(notificationList));
 
         // createdAt 순서로 정렬
@@ -77,5 +81,21 @@ public NotificationResponseDTO getNotificationHistory(int page) {
                 .build();
     }
 
+    private List<NotificationDTO> fromReplyToNotification(List<Reply> replyList) {
+        List<NotificationDTO> result = new ArrayList<>();
+        for (Reply reply : replyList) {
+            NotificationDTO dto = NotificationDTO.builder()
+                    .id(reply.getId())
+                    .targetKey(reply.getDaily().getDate())
+                    .notificationType(NotificationType.REPLY)
+                    .sender(userRepository.findById(reply.getSenderId()).get().getNickname())
+                    .elapsedTime(DateUtil.getElapsedTime(reply.getCreatedAt()))
+                    .createdAt(reply.getCreatedAt().toString())
+                    .build();
+            result.add(dto);
+        }
+        return result;
+    }
+
 
 }