diff --git a/src/main/java/tipitapi/drawmytoday/diary/service/ValidateDiaryService.java b/src/main/java/tipitapi/drawmytoday/diary/service/ValidateDiaryService.java
index 510786bf..4946aafe 100644
--- a/src/main/java/tipitapi/drawmytoday/diary/service/ValidateDiaryService.java
+++ b/src/main/java/tipitapi/drawmytoday/diary/service/ValidateDiaryService.java
@@ -26,8 +26,9 @@ public Diary validateDiaryById(Long diaryId, User user) {
     }
 
     public void validateExistsByDate(Long userId, LocalDate diaryDate) {
-        diaryRepository.getDiaryExistsByDiaryDate(userId, diaryDate)
-            .orElseThrow(DiaryDateAlreadyExistsException::new);
+        if (diaryRepository.getDiaryExistsByDiaryDate(userId, diaryDate).isPresent()) {
+            throw new DiaryDateAlreadyExistsException();
+        }
     }
 
     private void ownedByUser(Diary diary, User user) {