diff --git a/src/CoreBundle/Entity/Ticket.php b/src/CoreBundle/Entity/Ticket.php
index 3e8881767f..dc508bcb23 100644
--- a/src/CoreBundle/Entity/Ticket.php
+++ b/src/CoreBundle/Entity/Ticket.php
@@ -10,8 +10,6 @@ use DateTime;
 use Doctrine\ORM\Mapping as ORM;
 
 /**
- * Ticket.
- *
  * @ORM\Table(name="ticket_ticket")
  * @ORM\Entity
  */
@@ -59,13 +57,13 @@ class Ticket
 
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\Course")
-     * @ORM\JoinColumn(name="course_id", referencedColumnName="id")
+     * @ORM\JoinColumn(name="course_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected Course $course;
 
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\Session")
-     * @ORM\JoinColumn(name="session_id", referencedColumnName="id")
+     * @ORM\JoinColumn(name="session_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected Session $session;
 
@@ -79,7 +77,7 @@ class Ticket
      */
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\User")
-     * @ORM\JoinColumn(name="assigned_last_user", referencedColumnName="id")
+     * @ORM\JoinColumn(name="assigned_last_user", referencedColumnName="id", onDelete="CASCADE")
      */
     protected ?User $assignedLastUser = null;
 
diff --git a/src/CoreBundle/Entity/TicketAssignedLog.php b/src/CoreBundle/Entity/TicketAssignedLog.php
index c5aba0447a..c6ac8797e6 100644
--- a/src/CoreBundle/Entity/TicketAssignedLog.php
+++ b/src/CoreBundle/Entity/TicketAssignedLog.php
@@ -10,8 +10,6 @@ use DateTime;
 use Doctrine\ORM\Mapping as ORM;
 
 /**
- * Class AssignedLog.
- *
  * @ORM\Table(
  *     name="ticket_assigned_log",
  * )
@@ -28,7 +26,7 @@ class TicketAssignedLog
 
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\Ticket")
-     * @ORM\JoinColumn(name="ticket_id", referencedColumnName="id")
+     * @ORM\JoinColumn(name="ticket_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected Ticket $ticket;
 
diff --git a/src/CoreBundle/Entity/TicketMessage.php b/src/CoreBundle/Entity/TicketMessage.php
index 49501b2e47..de45114654 100644
--- a/src/CoreBundle/Entity/TicketMessage.php
+++ b/src/CoreBundle/Entity/TicketMessage.php
@@ -11,8 +11,6 @@ use Doctrine\ORM\Mapping as ORM;
 use Gedmo\Mapping\Annotation as Gedmo;
 
 /**
- * Ticket messages.
- *
  * @ORM\Table(name="ticket_message")
  * @ORM\Entity
  */
@@ -47,7 +45,7 @@ class TicketMessage
 
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\Ticket")
-     * @ORM\JoinColumn(name="ticket_id", referencedColumnName="id")
+     * @ORM\JoinColumn(name="ticket_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected Ticket $ticket;
 
diff --git a/src/CoreBundle/Entity/TicketMessageAttachment.php b/src/CoreBundle/Entity/TicketMessageAttachment.php
index fe7641b2b0..c725cdd390 100644
--- a/src/CoreBundle/Entity/TicketMessageAttachment.php
+++ b/src/CoreBundle/Entity/TicketMessageAttachment.php
@@ -24,13 +24,13 @@ class TicketMessageAttachment extends AbstractResource implements ResourceInterf
 
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\Ticket")
-     * @ORM\JoinColumn(name="ticket_id", referencedColumnName="id")
+     * @ORM\JoinColumn(name="ticket_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected Ticket $ticket;
 
     /**
      * @ORM\ManyToOne(targetEntity="TicketMessage")
-     * @ORM\JoinColumn(name="message_id", referencedColumnName="id")
+     * @ORM\JoinColumn(name="message_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected TicketMessage $message;
 
diff --git a/src/CoreBundle/Entity/TrackEAttempt.php b/src/CoreBundle/Entity/TrackEAttempt.php
index c746a20b18..d7ac44f405 100644
--- a/src/CoreBundle/Entity/TrackEAttempt.php
+++ b/src/CoreBundle/Entity/TrackEAttempt.php
@@ -40,7 +40,7 @@ class TrackEAttempt
 
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\TrackExercise", inversedBy="attempts")
-     * @ORM\JoinColumn(name="exe_id", referencedColumnName="exe_id", nullable=false)
+     * @ORM\JoinColumn(name="exe_id", referencedColumnName="exe_id", nullable=false, onDelete="CASCADE")
      */
     #[Assert\NotNull]
     protected TrackExercise $trackExercise;
diff --git a/src/CoreBundle/Entity/TrackExercise.php b/src/CoreBundle/Entity/TrackExercise.php
index c92b1fd2b5..96dcd6c37b 100644
--- a/src/CoreBundle/Entity/TrackExercise.php
+++ b/src/CoreBundle/Entity/TrackExercise.php
@@ -34,21 +34,21 @@ class TrackExercise
 
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\User")
-     * @ORM\JoinColumn(name="exe_user_id", referencedColumnName="id", nullable=false)
+     * @ORM\JoinColumn(name="exe_user_id", referencedColumnName="id", nullable=false, onDelete="CASCADE")
      */
     #[Assert\NotNull]
     protected User $user;
 
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\Course")
-     * @ORM\JoinColumn(name="c_id", referencedColumnName="id", nullable=false)
+     * @ORM\JoinColumn(name="c_id", referencedColumnName="id", nullable=false, onDelete="CASCADE")
      */
     #[Assert\NotNull]
     protected Course $course;
 
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CoreBundle\Entity\Session")
-     * @ORM\JoinColumn(name="session_id", referencedColumnName="id")
+     * @ORM\JoinColumn(name="session_id", referencedColumnName="id", onDelete="CASCADE")
      */
     protected ?Session $session = null;
 
diff --git a/src/CoreBundle/Migrations/Schema/V200/Version20.php b/src/CoreBundle/Migrations/Schema/V200/Version20.php
index 91d5d6c828..8e60418588 100644
--- a/src/CoreBundle/Migrations/Schema/V200/Version20.php
+++ b/src/CoreBundle/Migrations/Schema/V200/Version20.php
@@ -388,24 +388,41 @@ class Version20 extends AbstractMigrationChamilo
                 'columns' => ['hotspot_course_code'],
                 'index' => [],
             ],
+            'c_item_property' => [
+                'fks' => [
+                    'FK_1D84C18129F6EE60',
+                    'FK_1D84C181330D47E9',
+                    'FK_1D84C181613FECDF',
+                    'FK_1D84C18191D79BD3',
+                    'FK_1D84C1819C859CC3',
+                ],
+            ],
         ];
 
         foreach ($dropColumnsAndIndex as $tableName => $data) {
             if ($schema->hasTable($tableName)) {
-                $indexList = $data['index'];
+                $table = $schema->getTable($tableName);
+
+                $indexList = $data['index'] ?? [];
                 foreach ($indexList as $index) {
                     if ($table->hasIndex($index)) {
                         $table->dropIndex($index);
                     }
                 }
 
-                $columns = $data['columns'];
-                $table = $schema->getTable($tableName);
+                $columns = $data['columns'] ?? [];
                 foreach ($columns as $column) {
                     if ($table->hasColumn($column)) {
                         $table->dropColumn($column);
                     }
                 }
+
+                $fks = $data['fks'] ?? [];
+                foreach ($fks as $fk) {
+                    if ($table->hasForeignKey($fk)) {
+                        $table->removeForeignKey($fk);
+                    }
+                }
             }
         }
 
diff --git a/src/CoreBundle/Migrations/Schema/V200/Version20180904175500.php b/src/CoreBundle/Migrations/Schema/V200/Version20180904175500.php
index 146b47464b..d0cc376457 100644
--- a/src/CoreBundle/Migrations/Schema/V200/Version20180904175500.php
+++ b/src/CoreBundle/Migrations/Schema/V200/Version20180904175500.php
@@ -99,7 +99,6 @@ class Version20180904175500 extends AbstractMigrationChamilo
         $table = $schema->getTable('track_e_exercises');
 
         $this->addSql('ALTER TABLE track_e_exercises CHANGE session_id session_id INT DEFAULT NULL');
-
         $this->addSql('ALTER TABLE track_e_attempt CHANGE session_id session_id INT DEFAULT NULL');
         $this->addSql('UPDATE track_e_attempt SET session_id = NULL WHERE session_id = 0');
         $this->addSql('DELETE FROM track_e_attempt WHERE session_id IS NOT NULL AND session_id NOT IN (select id FROM session)');
@@ -111,15 +110,15 @@ class Version20180904175500 extends AbstractMigrationChamilo
         $this->addSql('DELETE FROM track_e_exercises WHERE exe_user_id IS NOT NULL AND exe_user_id NOT IN (select id FROM user)');
 
         if (!$table->hasForeignKey('FK_AA0DA082613FECDF')) {
-            $this->addSql('ALTER TABLE track_e_exercises ADD CONSTRAINT FK_AA0DA082613FECDF FOREIGN KEY (session_id) REFERENCES session (id)');
+            $this->addSql('ALTER TABLE track_e_exercises ADD CONSTRAINT FK_AA0DA082613FECDF FOREIGN KEY (session_id) REFERENCES session (id) ON DELETE CASCADE');
         }
 
         if (!$table->hasForeignKey('FK_AA0DA082613FECDF')) {
-            $this->addSql('ALTER TABLE track_e_exercises ADD CONSTRAINT FK_AA0DA08291D79BD3 FOREIGN KEY (c_id) REFERENCES course (id) ');
+            $this->addSql('ALTER TABLE track_e_exercises ADD CONSTRAINT FK_AA0DA08291D79BD3 FOREIGN KEY (c_id) REFERENCES course (id) ON DELETE CASCADE');
         }
 
         if (!$table->hasForeignKey('FK_AA0DA082F6A6790')) {
-            $this->addSql('ALTER TABLE track_e_exercises ADD CONSTRAINT FK_AA0DA082F6A6790 FOREIGN KEY (exe_user_id) REFERENCES user (id)  ');
+            $this->addSql('ALTER TABLE track_e_exercises ADD CONSTRAINT FK_AA0DA082F6A6790 FOREIGN KEY (exe_user_id) REFERENCES user (id) ON DELETE CASCADE ');
         }
 
         if ($table->hasColumn('exe_weighting')) {
@@ -167,7 +166,7 @@ class Version20180904175500 extends AbstractMigrationChamilo
 
         if (!$table->hasForeignKey('FK_F8C342C3B5A18F57')) {
             $this->addSql(
-                'ALTER TABLE track_e_attempt ADD CONSTRAINT FK_F8C342C3B5A18F57 FOREIGN KEY (exe_id) REFERENCES track_e_exercises (exe_id)'
+                'ALTER TABLE track_e_attempt ADD CONSTRAINT FK_F8C342C3B5A18F57 FOREIGN KEY (exe_id) REFERENCES track_e_exercises (exe_id) ON DELETE CASCADE'
             );
         }
 
diff --git a/src/CoreBundle/Migrations/Schema/V200/Version20211005153900.php b/src/CoreBundle/Migrations/Schema/V200/Version20211005153900.php
index 5e691da015..b26136ba0a 100644
--- a/src/CoreBundle/Migrations/Schema/V200/Version20211005153900.php
+++ b/src/CoreBundle/Migrations/Schema/V200/Version20211005153900.php
@@ -22,20 +22,52 @@ class Version20211005153900 extends AbstractMigrationChamilo
             'UPDATE ticket_ticket SET assigned_last_user = NULL WHERE assigned_last_user NOT IN (SELECT id FROM user)'
         );
 
-        if (false === $table->hasForeignKey('FK_EDE2C7686219A7B7')) {
+        $this->addSql('UPDATE ticket_ticket SET session_id = NULL WHERE session_id = 0');
+        $this->addSql('UPDATE ticket_ticket SET course_id = NULL WHERE course_id = 0');
+
+        $this->addSql('DELETE FROM ticket_ticket WHERE session_id IS NOT NULL AND session_id NOT IN (SELECT id FROM session)');
+        $this->addSql('DELETE FROM ticket_ticket WHERE course_id IS NOT NULL AND course_id NOT IN (SELECT id FROM course)');
+
+        if (!$table->hasForeignKey('FK_EDE2C7686219A7B7')) {
             $this->addSql(
-                'ALTER TABLE ticket_ticket ADD CONSTRAINT FK_EDE2C7686219A7B7 FOREIGN KEY (assigned_last_user) REFERENCES user (id)'
+                'ALTER TABLE ticket_ticket ADD CONSTRAINT FK_EDE2C7686219A7B7 FOREIGN KEY (assigned_last_user) REFERENCES user (id) ON DELETE CASCADE'
             );
         }
 
+        if (!$table->hasForeignKey('FK_EDE2C768591CC992')) {
+            $this->addSql('ALTER TABLE ticket_ticket ADD CONSTRAINT FK_EDE2C768591CC992 FOREIGN KEY (course_id) REFERENCES course (id) ON DELETE CASCADE;');
+        }
+
+        if (!$table->hasForeignKey('FK_EDE2C768613FECDF')) {
+            $this->addSql('ALTER TABLE ticket_ticket ADD CONSTRAINT FK_EDE2C768613FECDF FOREIGN KEY (session_id) REFERENCES session (id) ON DELETE CASCADE;');
+        }
+
         if (false === $table->hasIndex('IDX_EDE2C7686219A7B7')) {
             $this->addSql('CREATE INDEX IDX_EDE2C7686219A7B7 ON ticket_ticket (assigned_last_user)');
         }
 
+        $table = $schema->getTable('ticket_assigned_log');
+        if (!$table->hasForeignKey('FK_54B65868700047D2')) {
+            $this->addSql('ALTER TABLE ticket_assigned_log ADD CONSTRAINT FK_54B65868700047D2 FOREIGN KEY (ticket_id) REFERENCES ticket_ticket (id) ON DELETE CASCADE;');
+        }
+
+        $table = $schema->getTable('ticket_message');
+        if (!$table->hasForeignKey('FK_BA71692D700047D2')) {
+            $this->addSql('ALTER TABLE ticket_message ADD CONSTRAINT FK_BA71692D700047D2 FOREIGN KEY (ticket_id) REFERENCES ticket_ticket (id) ON DELETE CASCADE;');
+        }
+
         // Attachments
         $table = $schema->getTable('ticket_message_attachments');
 
-        if (false === $table->hasColumn('resource_node_id')) {
+        if (!$table->hasForeignKey('FK_70BF9E26537A1329')) {
+            $this->addSql('ALTER TABLE ticket_message_attachments ADD CONSTRAINT FK_70BF9E26537A1329 FOREIGN KEY (message_id) REFERENCES ticket_message (id) ON DELETE CASCADE;');
+        }
+
+        if (!$table->hasForeignKey('FK_70BF9E26700047D2')) {
+            $this->addSql('ALTER TABLE ticket_message_attachments ADD CONSTRAINT FK_70BF9E26700047D2 FOREIGN KEY (ticket_id) REFERENCES ticket_ticket (id) ON DELETE CASCADE;');
+        }
+
+        if (!$table->hasColumn('resource_node_id')) {
             $this->addSql('ALTER TABLE ticket_message_attachments ADD resource_node_id BIGINT DEFAULT NULL;');
             $this->addSql(
                 'ALTER TABLE ticket_message_attachments ADD CONSTRAINT FK_70BF9E261BAD783F FOREIGN KEY (resource_node_id) REFERENCES resource_node (id) ON DELETE CASCADE;'
diff --git a/tests/CoreBundle/Repository/TrackExerciseRepositoryTest.php b/tests/CoreBundle/Repository/TrackExerciseRepositoryTest.php
index 7d6381cf1c..f79323cc16 100644
--- a/tests/CoreBundle/Repository/TrackExerciseRepositoryTest.php
+++ b/tests/CoreBundle/Repository/TrackExerciseRepositoryTest.php
@@ -12,6 +12,7 @@ use Chamilo\CoreBundle\Entity\AttemptFile;
 use Chamilo\CoreBundle\Entity\TrackEAttempt;
 use Chamilo\CoreBundle\Entity\TrackExercise;
 use Chamilo\CoreBundle\Repository\AssetRepository;
+use Chamilo\CoreBundle\Repository\Node\CourseRepository;
 use Chamilo\CoreBundle\Repository\TrackExerciseRepository;
 use Chamilo\CourseBundle\Entity\CQuiz;
 use Chamilo\CourseBundle\Repository\CQuizRepository;
@@ -29,11 +30,16 @@ class TrackExerciseRepositoryTest extends AbstractApiTest
         $em = $this->getEntityManager();
 
         $course = $this->createCourse('new');
+
         $teacher = $this->createUser('teacher');
         $student = $this->createUser('student');
 
-        $repo = self::getContainer()->get(TrackExerciseRepository::class);
+        $courseRepo = self::getContainer()->get(CourseRepository::class);
+        $trackExerciseRepo = self::getContainer()->get(TrackExerciseRepository::class);
         $exerciseRepo = self::getContainer()->get(CQuizRepository::class);
+
+        $this->assertSame(1, $courseRepo->count([]));
+
         $exercise = (new CQuiz())
             ->setTitle('exercise')
             ->setParent($course)
@@ -65,13 +71,22 @@ class TrackExerciseRepositoryTest extends AbstractApiTest
         $em->persist($trackExercise);
         $this->assertHasNoEntityViolations($trackExercise);
         $em->flush();
-        $this->assertSame(1, $repo->count([]));
+        $this->assertSame(1, $trackExerciseRepo->count([]));
         $this->assertSame(1, $exerciseRepo->count([]));
+        $this->assertSame(1, $courseRepo->count([]));
 
-        $repo->delete($trackExercise);
+        $trackExerciseRepo->delete($trackExercise);
 
-        $this->assertSame(0, $repo->count([]));
+        $this->assertSame(1, $courseRepo->count([]));
+        $this->assertSame(0, $trackExerciseRepo->count([]));
         $this->assertSame(1, $exerciseRepo->count([]));
+
+        $em->remove($course);
+        $em->flush();
+
+        $this->assertSame(0, $trackExerciseRepo->count([]));
+        $this->assertSame(0, $exerciseRepo->count([]));
+        $this->assertSame(0, $courseRepo->count([]));
     }
 
     public function testCreateWithAttempt(): void
@@ -79,7 +94,9 @@ class TrackExerciseRepositoryTest extends AbstractApiTest
         self::bootKernel();
 
         $em = $this->getEntityManager();
-        $repo = self::getContainer()->get(TrackExerciseRepository::class);
+
+        $courseRepo = self::getContainer()->get(CourseRepository::class);
+        $trackExerciseRepo = self::getContainer()->get(TrackExerciseRepository::class);
         $exerciseRepo = self::getContainer()->get(CQuizRepository::class);
 
         $course = $this->createCourse('new');
@@ -128,7 +145,6 @@ class TrackExerciseRepositoryTest extends AbstractApiTest
         $this->assertHasNoEntityViolations($trackExercise);
         $em->flush();
 
-        //$trackExercise = $repo->find($trackExercise->getExeId());
         $this->assertSame(1, $trackExercise->getAttempts()->count());
         $this->assertInstanceOf(TrackEAttempt::class, $trackExercise->getAttemptByQuestionId(1));
 
@@ -190,8 +206,16 @@ class TrackExerciseRepositoryTest extends AbstractApiTest
         $this->assertSame(1, $trackExercise->getAttempts()->count());
         $this->assertSame(1, $attempt->getAttemptFeedbacks()->count());
         $this->assertSame(1, $attempt->getAttemptFiles()->count());
-
-        $this->assertSame(1, $repo->count([]));
+        $this->assertSame(1, $trackExerciseRepo->count([]));
         $this->assertSame(1, $exerciseRepo->count([]));
+        $this->assertSame(1, $courseRepo->count([]));
+
+        // Delete course.
+        $em->remove($course);
+        $em->flush();
+
+        $this->assertSame(0, $courseRepo->count([]));
+        $this->assertSame(0, $exerciseRepo->count([]));
+        $this->assertSame(0, $trackExerciseRepo->count([]));
     }
 }