diff --git a/main/exercise/exercise.php b/main/exercise/exercise.php
index 45259d659b..e7caebd3ea 100644
--- a/main/exercise/exercise.php
+++ b/main/exercise/exercise.php
@@ -70,6 +70,7 @@ Session::erase('objAnswer');
 Session::erase('questionList');
 Session::erase('exerciseResult');
 Session::erase('firstTime');
+Session::erase('calculatedAnswerId');
 
 //General POST/GET/SESSION/COOKIES parameters recovery
 $origin = api_get_origin();
diff --git a/main/exercise/exercise_result.php b/main/exercise/exercise_result.php
index 687462f39a..ae929b540d 100755
--- a/main/exercise/exercise_result.php
+++ b/main/exercise/exercise_result.php
@@ -202,6 +202,7 @@ if ($origin != 'learnpath') {
     if (api_is_allowed_to_session_edit()) {
         Session::erase('objExercise');
         Session::erase('exe_id');
+        Session::erase('calculatedAnswerId');
     }
     Display::display_footer();
 } else {
@@ -212,6 +213,7 @@ if ($origin != 'learnpath') {
     if (api_is_allowed_to_session_edit()) {
         Session::erase('objExercise');
         Session::erase('exe_id');
+        Session::erase('calculatedAnswerId');
     }
 
     Session::write('attempt_remaining', $remainingMessage);
diff --git a/main/exercise/overview.php b/main/exercise/overview.php
index e37e4ef54d..3c80d9bd41 100755
--- a/main/exercise/overview.php
+++ b/main/exercise/overview.php
@@ -16,6 +16,7 @@ $current_course_tool = TOOL_QUIZ;
 
 // Clear the exercise session just in case
 Session::erase('objExercise');
+Session::erase('calculatedAnswerId');
 
 $this_section = SECTION_COURSES;