diff --git a/plugin/xapi/src/ToolExperience/Statement/BaseStatement.php b/plugin/xapi/src/ToolExperience/Statement/BaseStatement.php
index 9ef9e68a8e..5b630c6020 100644
--- a/plugin/xapi/src/ToolExperience/Statement/BaseStatement.php
+++ b/plugin/xapi/src/ToolExperience/Statement/BaseStatement.php
@@ -28,11 +28,11 @@ abstract class BaseStatement
 {
     abstract public function generate(): Statement;
 
-    protected function generateStatementId(string $type, string $value): StatementId
+    protected function generateStatementId(string $type): StatementId
     {
         $uuid = Uuid::uuid5(
             XApiPlugin::create()->get(XApiPlugin::SETTING_UUID_NAMESPACE),
-            "$type/$value"
+            uniqid($type)
         );
 
         return StatementId::fromUuid($uuid);
diff --git a/plugin/xapi/src/ToolExperience/Statement/LearningPathCompleted.php b/plugin/xapi/src/ToolExperience/Statement/LearningPathCompleted.php
index b2d48c61f5..7629a9a8ff 100644
--- a/plugin/xapi/src/ToolExperience/Statement/LearningPathCompleted.php
+++ b/plugin/xapi/src/ToolExperience/Statement/LearningPathCompleted.php
@@ -43,7 +43,7 @@ class LearningPathCompleted extends BaseStatement
         $lpActivity = new LearningPathActivity($this->lp);
 
         return new Statement(
-            null,
+            $this->generateStatementId('learning-path'),
             $userActor->generate(),
             $completedVerb->generate(),
             $lpActivity->generate(),
diff --git a/plugin/xapi/src/ToolExperience/Statement/LearningPathItemViewed.php b/plugin/xapi/src/ToolExperience/Statement/LearningPathItemViewed.php
index 7a23708aac..f2cc3942df 100644
--- a/plugin/xapi/src/ToolExperience/Statement/LearningPathItemViewed.php
+++ b/plugin/xapi/src/ToolExperience/Statement/LearningPathItemViewed.php
@@ -59,7 +59,7 @@ class LearningPathItemViewed extends BaseStatement
             ->withAddedGroupingActivity($lpActivity->generate());
 
         return new Statement(
-            null,
+            $this->generateStatementId('learning-path-item'),
             $userActor->generate(),
             $viewedVerb->generate(),
             $lpItemActivity->generate(),
diff --git a/plugin/xapi/src/ToolExperience/Statement/PortfolioItemCommented.php b/plugin/xapi/src/ToolExperience/Statement/PortfolioItemCommented.php
index ae2399a0fe..8997cdde51 100644
--- a/plugin/xapi/src/ToolExperience/Statement/PortfolioItemCommented.php
+++ b/plugin/xapi/src/ToolExperience/Statement/PortfolioItemCommented.php
@@ -31,6 +31,8 @@ class PortfolioItemCommented extends BaseStatement
         $portfolioItem = $this->comment->getItem();
         $commentParent = $this->comment->getParent();
 
+        $statementId = $this->generateStatementId('portfolio-comment');
+
         $userActor = new UserActor($this->comment->getAuthor());
         $statementResult = new Result(null, null, null, $this->comment->getContent());
 
@@ -55,7 +57,7 @@ class PortfolioItemCommented extends BaseStatement
                 ->withAddedGroupingActivity($itemActivity->generate());
 
             return new Statement(
-                null,
+                $statementId,
                 $userActor->generate(),
                 $repliedVerb->generate(),
                 $parentCommentActivity->generate(),
@@ -72,6 +74,7 @@ class PortfolioItemCommented extends BaseStatement
             $commentedVerb = new CommentedVerb();
 
             return $itemShared->generate()
+                ->withId($statementId)
                 ->withActor($userActor->generate())
                 ->withVerb($commentedVerb->generate())
                 ->withStored($this->comment->getDate())
diff --git a/plugin/xapi/src/ToolExperience/Statement/PortfolioItemShared.php b/plugin/xapi/src/ToolExperience/Statement/PortfolioItemShared.php
index abdf27de4e..25b2cae645 100644
--- a/plugin/xapi/src/ToolExperience/Statement/PortfolioItemShared.php
+++ b/plugin/xapi/src/ToolExperience/Statement/PortfolioItemShared.php
@@ -11,6 +11,7 @@ use Chamilo\PluginBundle\XApi\ToolExperience\Activity\PortfolioItem as Portfolio
 use Chamilo\PluginBundle\XApi\ToolExperience\Actor\User as UserActor;
 use Chamilo\PluginBundle\XApi\ToolExperience\Verb\Shared as SharedVerb;
 use Xabbuh\XApi\Model\Statement;
+use Xabbuh\XApi\Model\StatementId;
 
 /**
  * Class PortfolioItemShared.
@@ -60,7 +61,7 @@ class PortfolioItemShared extends BaseStatement
         );
 
         return new Statement(
-            null,
+            $this->generateStatementId('portfolio-item'),
             $userActor->generate(),
             $sharedVerb->generate(),
             $itemActivity->generate(),
diff --git a/plugin/xapi/src/ToolExperience/Statement/QuizCompleted.php b/plugin/xapi/src/ToolExperience/Statement/QuizCompleted.php
index 2ed3439db4..2a4e9ba517 100644
--- a/plugin/xapi/src/ToolExperience/Statement/QuizCompleted.php
+++ b/plugin/xapi/src/ToolExperience/Statement/QuizCompleted.php
@@ -50,7 +50,7 @@ class QuizCompleted extends BaseStatement
         $duration = $this->exe->getExeDuration();
 
         return new Statement(
-            null,
+            $this->generateStatementId('exercise'),
             $userActor->generate(),
             $completedVerb->generate(),
             $quizActivity->generate(),
diff --git a/plugin/xapi/src/ToolExperience/Statement/QuizQuestionAnswered.php b/plugin/xapi/src/ToolExperience/Statement/QuizQuestionAnswered.php
index 20b5736b24..d1f5a04e42 100644
--- a/plugin/xapi/src/ToolExperience/Statement/QuizQuestionAnswered.php
+++ b/plugin/xapi/src/ToolExperience/Statement/QuizQuestionAnswered.php
@@ -61,7 +61,7 @@ class QuizQuestionAnswered extends BaseStatement
             ->withAddedGroupingActivity($quizActivity->generate());
 
         return new Statement(
-            null,
+            $this->generateStatementId('exercise-question'),
             $userActor->generate(),
             $answeredVerb->generate(),
             $questionActivity->generate(),