diff --git a/src/main/java/org/hankki/hankkiserver/api/advice/GlobalExceptionHandler.java b/src/main/java/org/hankki/hankkiserver/api/advice/GlobalExceptionHandler.java
index 9b41dfff..79484a6d 100644
--- a/src/main/java/org/hankki/hankkiserver/api/advice/GlobalExceptionHandler.java
+++ b/src/main/java/org/hankki/hankkiserver/api/advice/GlobalExceptionHandler.java
@@ -34,9 +34,9 @@ public HankkiResponse<Void> handleEntityNotFoundException(NotFoundException e) {
     }
 
     @ExceptionHandler(ConflictException.class)
-    public HankkiResponse<Object> handleConflictException(ConflictException e) {
+    public HankkiResponse<Void> handleConflictException(ConflictException e) {
         log.error("handleConflictException() in GlobalExceptionHandler throw ConflictException : {}", e.getMessage());
-        return HankkiResponse.fail(e.getErrorCode(), e.getData());
+        return HankkiResponse.fail(e.getErrorCode());
     }
 
     @ExceptionHandler(MissingServletRequestParameterException.class)
diff --git a/src/main/java/org/hankki/hankkiserver/api/dto/HankkiResponse.java b/src/main/java/org/hankki/hankkiserver/api/dto/HankkiResponse.java
index 46e548e9..4e2d6b00 100644
--- a/src/main/java/org/hankki/hankkiserver/api/dto/HankkiResponse.java
+++ b/src/main/java/org/hankki/hankkiserver/api/dto/HankkiResponse.java
@@ -27,8 +27,4 @@ public static <T> HankkiResponse<T> success(SuccessCode success, T data) {
     public static <T> HankkiResponse<T> fail(ErrorCode error) {
         return new HankkiResponse<>(error.getHttpStatus().value(), error.getMessage());
     }
-
-    public static <T> HankkiResponse<T> fail(ErrorCode error, T data) {
-        return new HankkiResponse<>(error.getHttpStatus().value(), error.getMessage(), data);
-    }
 }
diff --git a/src/main/java/org/hankki/hankkiserver/api/store/service/StoreQueryService.java b/src/main/java/org/hankki/hankkiserver/api/store/service/StoreQueryService.java
index 6cd4649e..4cf9ff5e 100644
--- a/src/main/java/org/hankki/hankkiserver/api/store/service/StoreQueryService.java
+++ b/src/main/java/org/hankki/hankkiserver/api/store/service/StoreQueryService.java
@@ -89,7 +89,7 @@ public void validateDuplicatedStore(final StoreValidationCommand command) {
 
     private void findUniversityStore(final Long universityId, final Store store) {
         if (universityStoreFinder.findByUniversityIdAndStore(universityId, store)) {
-            throw new ConflictException(StoreErrorCode.STORE_ALREADY_REGISTERED, new StoreDuplicateErrorResponse(store.getId()));
+            throw new ConflictException(StoreErrorCode.STORE_ALREADY_REGISTERED);
         }
     }
 }
diff --git a/src/main/java/org/hankki/hankkiserver/common/exception/ConflictException.java b/src/main/java/org/hankki/hankkiserver/common/exception/ConflictException.java
index b55fa18e..aa2d9182 100644
--- a/src/main/java/org/hankki/hankkiserver/common/exception/ConflictException.java
+++ b/src/main/java/org/hankki/hankkiserver/common/exception/ConflictException.java
@@ -6,16 +6,9 @@
 @Getter
 public class ConflictException extends RuntimeException {
     private final ErrorCode errorCode;
-    private Object data;
 
     public ConflictException(ErrorCode errorCode) {
         super(errorCode.getMessage());
         this.errorCode = errorCode;
     }
-
-    public ConflictException(ErrorCode errorCode, Object data) {
-        super(errorCode.getMessage());
-        this.errorCode = errorCode;
-        this.data = data;
-    }
 }