diff --git a/pom.xml b/pom.xml
index 952a462..140c18b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -37,9 +37,9 @@
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <project.testresult.directory>${project.build.directory}/test-results</project.testresult.directory>
         <properties-maven-plugin.version>1.0.0</properties-maven-plugin.version>
-        <quarkus-plugin.version>3.19.2</quarkus-plugin.version>
+        <quarkus-plugin.version>3.25.4</quarkus-plugin.version>
         <quarkus.logManager>org.jboss.logmanager.LogManager</quarkus.logManager>
-        <quarkus.platform.version>3.19.2</quarkus.platform.version>
+        <quarkus.platform.version>3.25.4</quarkus.platform.version>
         <sonar-maven-plugin.version>3.7.0.1746</sonar-maven-plugin.version>
     </properties>
     <dependencyManagement>
@@ -58,7 +58,7 @@
        <dependency>
             <groupId>org.apache.pdfbox</groupId>
             <artifactId>pdfbox</artifactId>
-            <version>3.0.4</version>
+            <version>3.0.5</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/io.quarkus/quarkus-awt -->
 <dependency>
@@ -76,7 +76,7 @@
 <dependency>
     <groupId>io.quarkiverse.minio</groupId>
     <artifactId>quarkus-minio</artifactId>
-    <version>3.7.7</version>
+    <version>3.8.4</version>
 </dependency>
 
         <dependency>
@@ -123,7 +123,7 @@
         <dependency>
             <groupId>org.ow2.asm</groupId>
             <artifactId>asm</artifactId>
-            <version>9.6</version>
+            <version>9.7.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -171,7 +171,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.9.1</version>
+            <version>2.13.1</version>
         </dependency>
         <dependency>
             <groupId>org.mapstruct</groupId>
@@ -193,13 +193,13 @@
         <dependency>
             <groupId>io.rest-assured</groupId>
             <artifactId>rest-assured</artifactId>
-                <version>5.5.1</version>
+                <version>5.5.6</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
-            <version>3.25.1</version>
+            <version>3.27.4</version>
             <scope>test</scope>
         </dependency>
         <dependency>
diff --git a/src/main/java/fr/istic/domain/Answer2HybridGradedComment.java b/src/main/java/fr/istic/domain/Answer2HybridGradedComment.java
index 63d4dbd..1f4ca3d 100644
--- a/src/main/java/fr/istic/domain/Answer2HybridGradedComment.java
+++ b/src/main/java/fr/istic/domain/Answer2HybridGradedComment.java
@@ -4,6 +4,8 @@
 import io.quarkus.hibernate.orm.panache.PanacheQuery;
 import io.quarkus.runtime.annotations.RegisterForReflection;
 import java.io.Serializable;
+import java.util.Set;
+
 import jakarta.json.bind.annotation.JsonbTransient;
 import jakarta.persistence.*;
 import org.hibernate.annotations.Cache;
@@ -124,6 +126,12 @@ public static long deleteAllAnswerHybridGradedCommentByCommentId(long  commentId
     public static long deleteAllAnswerHybridGradedCommentByAnswerId(long  responseId){
         return delete("studentResponse.id", responseId);
     }
+    public static long deleteAllByQIds( Set<Long> qids){
+        return delete("delete from Answer2HybridGradedComment ar where ar.studentResponse.question.id in ?1", qids);
+    }
+    public static long deleteAllAnswerHybridGradedCommentByCommentIds(Set<Long>   commentIds){
+        return delete("delete from Answer2HybridGradedComment ar where ar.hybridcomments.id in ?1", commentIds);
+    }
 
 
 
diff --git a/src/main/java/fr/istic/domain/Comments.java b/src/main/java/fr/istic/domain/Comments.java
index 59e8ad7..3f1c4e6 100644
--- a/src/main/java/fr/istic/domain/Comments.java
+++ b/src/main/java/fr/istic/domain/Comments.java
@@ -2,6 +2,7 @@
 import io.quarkus.hibernate.orm.panache.PanacheEntityBase;
 import jakarta.json.bind.annotation.JsonbTransient;
 import io.quarkus.hibernate.orm.panache.PanacheQuery;
+import io.quarkus.logging.Log;
 import io.quarkus.runtime.annotations.RegisterForReflection;
 import org.hibernate.annotations.Cache;
 import org.hibernate.annotations.CacheConcurrencyStrategy;
diff --git a/src/main/java/fr/istic/domain/HybridGradedComment.java b/src/main/java/fr/istic/domain/HybridGradedComment.java
index 1ddf6b2..e75ee1d 100644
--- a/src/main/java/fr/istic/domain/HybridGradedComment.java
+++ b/src/main/java/fr/istic/domain/HybridGradedComment.java
@@ -2,6 +2,7 @@
 
 import io.quarkus.hibernate.orm.panache.PanacheEntityBase;
 import io.quarkus.hibernate.orm.panache.PanacheQuery;
+import io.quarkus.logging.Log;
 import io.quarkus.runtime.annotations.RegisterForReflection;
 import java.io.Serializable;
 import java.util.HashSet;
@@ -47,7 +48,7 @@ public class HybridGradedComment extends PanacheEntityBase implements Serializab
     @JsonbTransient
     public Question question;
 
-    @OneToMany(mappedBy = "hybridcomments")
+    @OneToMany(mappedBy = "hybridcomments", cascade = CascadeType.REMOVE, orphanRemoval = true)
     @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
     public Set<Answer2HybridGradedComment> valueAnswers = new HashSet<>();
 
@@ -133,6 +134,10 @@ public static HybridGradedComment persistOrUpdate(HybridGradedComment hybridGrad
     public static PanacheQuery<HybridGradedComment> findByQuestionId( long qid) {
         return find("select hybridGradedComment from HybridGradedComment hybridGradedComment where hybridGradedComment.question.id =?1", qid);
     }
+    public static PanacheQuery<HybridGradedComment> findByExamId( long qid) {
+        return find("select hybridGradedComment from HybridGradedComment hybridGradedComment where hybridGradedComment.question.exam.id =?1", qid);
+    }
+
 
     public static PanacheQuery<HybridGradedComment> canAccess(long commentId, String login) {
         return find("select ex from HybridGradedComment ex join ex.question.exam.course.profs as u where ex.id =?1 and u.login =?2", commentId, login);
diff --git a/src/main/java/fr/istic/service/CourseService.java b/src/main/java/fr/istic/service/CourseService.java
index a82c2b3..69a64ab 100644
--- a/src/main/java/fr/istic/service/CourseService.java
+++ b/src/main/java/fr/istic/service/CourseService.java
@@ -25,7 +25,6 @@
 import java.util.stream.Collectors;
 
 @ApplicationScoped
-@Transactional
 public class CourseService {
 
     private final Logger log = LoggerFactory.getLogger(CourseService.class);
@@ -50,12 +49,37 @@ public CourseDTO persistOrUpdate(CourseDTO courseDTO) {
      *
      * @param id the id of the entity.
      */
-    @Transactional
+    protected void prepareDelete(Long id) {
+        Course.findByIdOptional(id).ifPresent(course -> {
+            List<Exam> exams = new ArrayList<>();
+            exams.addAll(Exam.findExambyCourseId(id).list());
+            exams.forEach(exam-> this.examService.delete(exam.id));
+        });
+    }
+
+
+
+        /**
+     * Delete the Course by id.
+     *
+     * @param id the id of the entity.
+     */
     public void delete(Long id) {
         log.debug("Request to delete Course : {}", id);
+        this.prepareDelete(id);
+        this.deleteinternal(id);
+    }
+
+
+    /**
+     * Delete the Course by id.
+     *
+     * @param id the id of the entity.
+     */
+    @Transactional
+    protected void deleteinternal(Long id) {
 
         Course.findByIdOptional(id).ifPresent(course -> {
-            Exam.findExambyCourseId(id).list().forEach(exam-> this.examService.delete(exam.id));
             Course c = Course.findById(id);
             c.groups.forEach(g -> {
                 g.students.forEach(st -> {
diff --git a/src/main/java/fr/istic/service/ExamService.java b/src/main/java/fr/istic/service/ExamService.java
index e0f95c4..8978cc3 100644
--- a/src/main/java/fr/istic/service/ExamService.java
+++ b/src/main/java/fr/istic/service/ExamService.java
@@ -14,6 +14,7 @@
 import fr.istic.domain.FinalResult;
 import fr.istic.domain.GradedComment;
 import fr.istic.domain.HybridGradedComment;
+import fr.istic.domain.Prediction;
 import fr.istic.domain.Question;
 import fr.istic.domain.QuestionType;
 import fr.istic.domain.Scan;
@@ -76,20 +77,29 @@ public ExamDTO persistOrUpdate(ExamDTO examDTO) {
      *
      * @param id the id of the entity.
      */
-    @Transactional
     public void delete(Long id) {
         log.debug("Request to delete Exam : {}", id);
-        Exam.findByIdOptional(id).ifPresent(exam -> {
-            StudentResponse.getAll4ExamIdEvenOrphan(id).list().forEach(sr -> {
+        this.prepareDeleteExam(id);
+        this.deleteExam(id);
+
+
+    }
+
+    @Transactional
+    public void prepareDeleteExam(long id){
+             Exam.findByIdOptional(id).ifPresent(exam -> {
+            ExamSheet.getAll4ExamIdEvenOrphan(id).list().forEach(sr -> sr.cleanBeforDelete());
+            /*StudentResponse.getAll4ExamIdEvenOrphan(id).list().forEach(sr -> {
                 sr.clearComments();
                 Answer2HybridGradedComment.deleteAllAnswerHybridGradedCommentByAnswerId(sr.id);
             });
 
-            ExamSheet.getAll4ExamIdEvenOrphan(id).list().forEach(sr -> sr.cleanBeforDelete());
             StudentResponse.getAll4ExamIdEvenOrphan(id).list().forEach(sr -> sr.delete());
             FinalResult.getAll4ExamId(id).list().forEach(f -> f.delete());
+            var s = HybridGradedComment.deleteByQIds(e.questions.stream().map(q -> q.id).collect(Collectors.toSet()));
+            log.error("to remove" + s);*/
+            this.deleteQuestionCommentAndZone(id);
             Exam e = Exam.findById(id);
-            HybridGradedComment.deleteByQIds(e.questions.stream().map(q -> q.id).collect(Collectors.toSet()));
 
             if (e.scanfile != null && this.fichierS3Service.isObjectExist("scan/" + e.scanfile.id + ".pdf")) {
                 try {
@@ -109,11 +119,18 @@ public void delete(Long id) {
                     e1.printStackTrace();
                 }
             }
-            exam.delete();
             Comments.deleteCommentByExamId("" + id);
-
             this.cacheService.deleteFile(id);
         });
+
+    }
+
+
+    @Transactional
+    protected void deleteExam(long id){
+            var e = Exam.findById(id);
+            e.delete();
+
     }
 
     @Transactional
@@ -169,11 +186,18 @@ protected void cleanExamZone(Set<Long> zoneids) {
 
     @Transactional
     protected void cleanQuestion(long examId, Set<Long> qids) {
-        StudentResponse.deleteByQIds(qids);
-        TextComment.deleteByQIds(qids);
-        GradedComment.deleteByQIds(qids);
+        var s  = Answer2HybridGradedComment.deleteAllByQIds(qids);
+        Set<Long> cids = HybridGradedComment.findByExamId(examId).list().stream().map(ex -> ex.id).collect(Collectors.toSet());
+        s  = Answer2HybridGradedComment.deleteAllAnswerHybridGradedCommentByCommentIds(cids);
+        s= StudentResponse.deleteByQIds(qids);
+        s= TextComment.deleteByQIds(qids);
+        s= GradedComment.deleteByQIds(qids);
+        s= HybridGradedComment.deleteByQIds(qids);
+        s=Prediction.deleteByQIds(qids);
+    }
+    @Transactional
+    protected void removeQuestion(long examId, Set<Long> qids) {
         Question.deleteAllExamId(examId);
-
     }
 
     @Transactional
@@ -187,16 +211,16 @@ protected void cleanFinalResult(long id) {
      *
      * @param id the id of the entity.
      */
-    @Transactional
-    public void deleteQuestionCommentAndZone(Long id) {
-        log.debug("Request to delete Exam : {}", id);
-        Set<Long> qids = Question.findQuestionbyExamId(id).list().stream().map(ex -> ex.id).collect(Collectors.toSet());
+    public void deleteQuestionCommentAndZone(Long examid) {
+        log.debug("Request to delete Exam : {}", examid);
+        Set<Long> qids = Question.findQuestionbyExamId(examid).list().stream().map(ex -> ex.id).collect(Collectors.toSet());
 
-        this.cleanFinalResult(id);
-        Set<Long> zonesids = this.cleanExamZone(id);
+        this.cleanFinalResult(examid);
+        Set<Long> zonesids = this.cleanExamZone(examid);
         this.cleanExamZone(zonesids);
         // this.cleanStudentRssponse(id);
-        this.cleanQuestion(id, qids);
+        this.cleanQuestion(examid, qids);
+        this.removeQuestion(examid, qids);
 
     }
 
diff --git a/src/main/java/fr/istic/service/FichierS3Service.java b/src/main/java/fr/istic/service/FichierS3Service.java
index dd62f4c..ec17d73 100644
--- a/src/main/java/fr/istic/service/FichierS3Service.java
+++ b/src/main/java/fr/istic/service/FichierS3Service.java
@@ -1,9 +1,6 @@
 package fr.istic.service;
 
 import java.io.ByteArrayInputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index c725062..a824d6a 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -187,10 +187,14 @@ quarkus.native.additional-build-args=\
 quarkus.http.limits.max-body-size=10G
 upload.directory= /tmp/files
 
-quarkus.minio.url=http://localhost:9000
+quarkus.minio.host=localhost
+quarkus.minio.port=9000
+
 quarkus.minio.access-key=admin
 quarkus.minio.secret-key=minioadmin
 quarkus.minio.secure=false
+quarkus.minio.devservices.enabled=false
+
 
 # quarkus.minio.allow-empty=false