diff --git a/main/inc/lib/PortfolioController.php b/main/inc/lib/PortfolioController.php
index a958050973..7a86905db2 100644
--- a/main/inc/lib/PortfolioController.php
+++ b/main/inc/lib/PortfolioController.php
@@ -1203,12 +1203,18 @@ class PortfolioController
             ;
         }
 
-        $comments = $commentsQueryBuilder
-            ->orderBy('comment.root, comment.lft', 'ASC')
-            ->setParameter('item', $item)
-            ->getQuery()
-            ->getArrayResult()
-        ;
+        if (true === api_get_configuration_value('portfolio_show_base_course_post_in_sessions')
+            && $this->session && !$item->getSession() && !$item->isDuplicatedInSession($this->session)
+        ) {
+            $comments = [];
+        } else {
+            $comments = $commentsQueryBuilder
+                ->orderBy('comment.root, comment.lft', 'ASC')
+                ->setParameter('item', $item)
+                ->getQuery()
+                ->getArrayResult()
+            ;
+        }
 
         $clockIcon = Display::returnFontAwesomeIcon('clock-o', '', true);
 
@@ -3762,6 +3768,9 @@ class PortfolioController
         $currentUserId = api_get_user_id();
 
         if ($this->course) {
+            $showBaseContentInSession = $this->session
+                && true === api_get_configuration_value('portfolio_show_base_course_post_in_sessions');
+
             $queryBuilder = $this->em->createQueryBuilder();
             $queryBuilder
                 ->select('pi')
@@ -3771,7 +3780,9 @@ class PortfolioController
             $queryBuilder->setParameter('course', $this->course);
 
             if ($this->session) {
-                $queryBuilder->andWhere('pi.session = :session');
+                $queryBuilder->andWhere(
+                    $showBaseContentInSession ? 'pi.session = :session OR pi.session IS NULL' : 'pi.session = :session'
+                );
                 $queryBuilder->setParameter('session', $this->session);
             } else {
                 $queryBuilder->andWhere('pi.session IS NULL');
@@ -3894,6 +3905,15 @@ class PortfolioController
             $queryBuilder->orderBy('pi.creationDate', 'DESC');
 
             $items = $queryBuilder->getQuery()->getResult();
+
+            if ($showBaseContentInSession) {
+                $items = array_filter(
+                    $items,
+                    fn(Portfolio $item) => !($this->session && !$item->getSession() && $item->isDuplicatedInSession($this->session))
+                );
+            }
+
+            return $items;
         } else {
             $itemsCriteria = [];
             $itemsCriteria['category'] = null;
diff --git a/main/template/default/portfolio/items.html.twig b/main/template/default/portfolio/items.html.twig
index 2fe874dd2c..f1baabeb17 100644
--- a/main/template/default/portfolio/items.html.twig
+++ b/main/template/default/portfolio/items.html.twig
@@ -11,6 +11,12 @@
             {% set item_url = baseurl ~ {'action':'view', 'id':item.id}|url_encode %}
             {% set comments = item.lastComments(3, is_advanced_sharing_enabled) %}
 
+            {% if 'portfolio_show_base_course_post_in_sessions'|api_get_configuration_value %}
+                {% if _c.session_id and not item.session and not item.isDuplicatedInSessionId(_c.session_id) %}
+                    {% set comments = {} %}
+                {% endif %}
+            {% endif %}
+
             <div class="panel panel-default">
                 <article class="panel-body portfolio-item" id="portfolio-item-{{ item.id }}">
                     <div class="portfolio-actions pull-right">