diff --git a/backend/src/main/java/com/edufocus/edufocus/qna/repository/QnaRepository.java b/backend/src/main/java/com/edufocus/edufocus/qna/repository/QnaRepository.java
index 19ebbcd..52ec462 100644
--- a/backend/src/main/java/com/edufocus/edufocus/qna/repository/QnaRepository.java
+++ b/backend/src/main/java/com/edufocus/edufocus/qna/repository/QnaRepository.java
@@ -13,8 +13,8 @@ import java.util.List;
 @Repository
 public interface QnaRepository extends JpaRepository<Qna, Long> {
 
-    List<Qna> findByLectureId(Long lecturerId);
-    
+    //List<Qna> findByLectureId(Long lecturerId);
+
     @Query("SELECT q FROM Qna q WHERE q.lecture.id = :lectureId ORDER BY q.createdAt DESC")
     Page<Qna> findByLectureId(Long lectureId, Pageable pageable);
 }
diff --git a/backend/src/main/resources/application.properties b/backend/src/main/resources/application.properties
index dd85ef5..943e868 100644
--- a/backend/src/main/resources/application.properties
+++ b/backend/src/main/resources/application.properties
@@ -21,7 +21,7 @@ spring.datasource.username=${USER_NAME}
 spring.datasource.password=${USER_PASSWORD}
 spring.mvc.pathmatch.matching-strategy=ant_path_matcher
 spring.jpa.database=mysql
-spring.jpa.hibernate.ddl-auto=create
+spring.jpa.hibernate.ddl-auto=update
 spring.jpa.show-sql=true  
 spring.jpa.properties.hibernate.jdbc.time_zone=Asia/Seoul
 management.endpoints.web.exposure.include=health,info