DB change c_quiz.save_correct_answers see BT#15844

src/CoreBundle/Migrations/Schema/V200/Version20.php

@@ -568,6 +568,8 @@ class Version20 extends AbstractMigrationChamilo
             );
         }
 
+        $this->addSql('ALTER TABLE c_quiz MODIFY COLUMN save_correct_answers INT NULL DEFAULT NULL');
+
         $table = $schema->getTable('c_lp_item_view');
         if ($table->hasIndex('idx_c_lp_item_view_cid_id_view_count') == false) {
             $this->addSql(

src/CourseBundle/Entity/CQuiz.php

@@ -155,8 +155,9 @@ class CQuiz
     protected $propagateNeg;
 
     /**
-     * @var bool
-     * @ORm\Column(name="save_correct_answers", type="boolean", nullable=false)
+     * @var int
+     *
+     * @ORm\Column(name="save_correct_answers", type="integer", nullable=true)
      */
     protected $saveCorrectAnswers;
 
@@ -633,7 +634,7 @@ class CQuiz
     }
 
     /**
-     * @param $saveCorrectAnswers boolean
+     * @param int $saveCorrectAnswers
      *
      * @return CQuiz
      */
@@ -645,7 +646,7 @@ class CQuiz
     }
 
     /**
-     * @return bool
+     * @return int
      */
     public function getSaveCorrectAnswers()
     {