diff --git a/backend/src/main/java/com/edufocus/edufocus/qna/service/QnaServiceImpl.java b/backend/src/main/java/com/edufocus/edufocus/qna/service/QnaServiceImpl.java
index 80ea7ae..dbc6d84 100644
--- a/backend/src/main/java/com/edufocus/edufocus/qna/service/QnaServiceImpl.java
+++ b/backend/src/main/java/com/edufocus/edufocus/qna/service/QnaServiceImpl.java
@@ -7,6 +7,7 @@ import com.edufocus.edufocus.qna.entity.QnaRequestDto;
 import com.edufocus.edufocus.qna.entity.QnaResponseDto;
 import com.edufocus.edufocus.qna.repository.QnaRepository;
 import com.edufocus.edufocus.user.model.entity.vo.User;
+import com.edufocus.edufocus.user.model.entity.vo.UserRole;
 import com.edufocus.edufocus.user.model.repository.UserRepository;
 import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
@@ -24,14 +25,13 @@ import java.util.stream.Collectors;
 @Service
 @Transactional
 @RequiredArgsConstructor
-public class QnaServiceImpl implements QnaService{
+public class QnaServiceImpl implements QnaService {
 
     private final QnaRepository qnaRepository;
     private final LectureRepository lectureRepository;
     private final UserRepository userRepository;
 
 
-
     @Override
     public QnaResponseDto createQna(Long id, QnaRequestDto qnaRequestDto, Long lecture_id) {
 
@@ -41,19 +41,21 @@ public class QnaServiceImpl implements QnaService{
         User user = userRepository.findById(id).orElse(null);
 
 
-
         Qna qna = QnaRequestDto.toEntity(qnaRequestDto);
+        if (qna.getAnswer() != null || user.getRole() != UserRole.ADMIN) {
+            throw new RuntimeException();
+        }
         qna.setLecture(lecture);
         qna.setUser(user);
 
         qna.setCreatedAt(new Date());
 
         qnaRepository.save(qna);
-    return QnaResponseDto.toEntity(qna);
+        return QnaResponseDto.toEntity(qna);
     }
 
     @Override
-    public QnaResponseDto  updateQna(Long id,QnaRequestDto qnaRequestDto) {
+    public QnaResponseDto updateQna(Long id, QnaRequestDto qnaRequestDto) {
 
 
         Qna findQna = qnaRepository.findById(id)
@@ -65,14 +67,14 @@ public class QnaServiceImpl implements QnaService{
 
         qnaRepository.save(findQna);
 
-            return QnaResponseDto.toEntity(findQna);
+        return QnaResponseDto.toEntity(findQna);
 
 
     }
 
     @Override
     public void deleteQna(Long id) {
-qnaRepository.deleteById(id);
+        qnaRepository.deleteById(id);
     }
 
     @Override
@@ -80,7 +82,7 @@ qnaRepository.deleteById(id);
         Optional<Qna> qna;
         try {
 
-            qna= qnaRepository.findById(id);
+            qna = qnaRepository.findById(id);
 
 
         } catch (Exception e) {
@@ -89,14 +91,12 @@ qnaRepository.deleteById(id);
         }
 
 
-
-            return QnaResponseDto.toEntity(qna.get());
+        return QnaResponseDto.toEntity(qna.get());
 
     }
 
     @Override
-    public List<QnaResponseDto> getAllQnasByLecture(Long lectureId,int pageSize)
-    {
+    public List<QnaResponseDto> getAllQnasByLecture(Long lectureId, int pageSize) {
 
         Pageable pageable = PageRequest.of(0, pageSize);
 
diff --git a/backend/src/main/java/com/edufocus/edufocus/report/service/ReportServiceImpl.java b/backend/src/main/java/com/edufocus/edufocus/report/service/ReportServiceImpl.java
index 5543795..d6c2cbc 100644
--- a/backend/src/main/java/com/edufocus/edufocus/report/service/ReportServiceImpl.java
+++ b/backend/src/main/java/com/edufocus/edufocus/report/service/ReportServiceImpl.java
@@ -60,7 +60,6 @@ public class ReportServiceImpl implements ReportService {
             Quiz quiz = quizList.get(idx);
             String inputAnswer = answerInputList.get(idx);
             Answer answer;
-            //
             if (quiz.getAnswer().equals(inputAnswer)) {
                 correctCount++;
                 answer = Answer.builder()
@@ -183,6 +182,7 @@ public class ReportServiceImpl implements ReportService {
 
         List<Report> reportList = reportRepository.findByUser_Id(userId);
 
+
         List<ReportListResponseDto> reportListResponseDtoList = new ArrayList<>();
 
 
diff --git a/backend/src/main/java/com/edufocus/edufocus/user/model/service/UserServiceImpl.java b/backend/src/main/java/com/edufocus/edufocus/user/model/service/UserServiceImpl.java
index 77fd4ca..93ef8c5 100644
--- a/backend/src/main/java/com/edufocus/edufocus/user/model/service/UserServiceImpl.java
+++ b/backend/src/main/java/com/edufocus/edufocus/user/model/service/UserServiceImpl.java
@@ -23,8 +23,7 @@ public class UserServiceImpl implements UserService {
     private final UserRepository userRepository;
 
 
-    public void join(RequestJoinDto requestJoinDto)
-    {
+    public void join(RequestJoinDto requestJoinDto) {
         User user = User.builder()
                 .userId(requestJoinDto.getUserId())
                 .email(requestJoinDto.getEmail())
@@ -36,7 +35,7 @@ public class UserServiceImpl implements UserService {
     }
 
 
-    public User login(User user){
+    public User login(User user) {
         Optional<User> findUser = userRepository.findByUserId(user.getUserId());
 
         if (findUser.isEmpty()) {
@@ -63,32 +62,29 @@ public class UserServiceImpl implements UserService {
     }
 
 
-
-
-
     @Override
-    public String getUserName(Long id){
+    public String getUserName(Long id) {
         return userRepository.findById(id).get().getName();
     }
 
 
     @Override
-    public void changeUserInfo(InfoDto infoDto, Long id){
+    public void changeUserInfo(InfoDto infoDto, Long id) {
 
         User user = userRepository.findById(id).orElseThrow(IllegalArgumentException::new);
 
         if (infoDto.getName() != null)
             user.setName(infoDto.getName());
 
-        if(infoDto.getEmail()!=null)
+        if (infoDto.getEmail() != null)
             user.setEmail(infoDto.getEmail());
 
         userRepository.save(user);
-}
+    }
 
 
     @Override
-    public void changePassword(PasswordDto passwordDto, Long id){
+    public void changePassword(PasswordDto passwordDto, Long id) {
         User user = userRepository.findById(id).orElse(null);
 
         if (user == null) {
@@ -97,6 +93,8 @@ public class UserServiceImpl implements UserService {
 
         if (!PasswordUtils.checkPassword(passwordDto.getCurrentPassword(), user.getPassword())) {
             throw new UserException("Current password is incorrect");
+        } else if (passwordDto.getCurrentPassword().equals(passwordDto.getNewPassword())) {
+            throw new UserException("New password cannot be the same as the current password");
         } else {
             if (!passwordDto.getNewPassword().equals(passwordDto.getNewPasswordCheck())) {
                 throw new UserException("New password confirmation does not match");
@@ -114,29 +112,30 @@ public class UserServiceImpl implements UserService {
     }
 
     public String getTempPassword() {
-        char[] charSet = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
+        char[] charSet = new char[]{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
                 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};
         String str = "";
 
         int idx = 0;
-        for (int i=0; i<10; i++) {
+        for (int i = 0; i < 10; i++) {
             idx = (int) (charSet.length * Math.random());
             str += charSet[idx];
         }
         return str;
     }
+
     @Override
-    public void saveRefreshToken(Long id, String refreshToken){
+    public void saveRefreshToken(Long id, String refreshToken) {
         userRepository.saveRefreshToken(id, refreshToken);
     }
 
     @Override
-    public String getRefreshToken(Long id){
+    public String getRefreshToken(Long id) {
         return userRepository.getRefreshToken(id);
     }
 
     @Override
-    public void deleteRefreshToken(Long id){
+    public void deleteRefreshToken(Long id) {
         userRepository.deleteRefreshToken(id);
     }