diff --git a/main/install/install.lib.php b/main/install/install.lib.php
index 6c01a38b12..f86b59a5d7 100755
--- a/main/install/install.lib.php
+++ b/main/install/install.lib.php
@@ -2808,11 +2808,11 @@ function fixLpId($connection, $debug)
         error_log('Fix lp.id lp.iids');
     }
 
-    $sql = "SELECT id, title, code FROM course";
+    $sql = 'SELECT id, title, code FROM course';
     $result = $connection->query($sql);
     $courses = $result->fetchAll();
 
-    $sql = "SELECT id FROM session";
+    $sql = 'SELECT id FROM session';
     $result = $connection->query($sql);
     $sessions = $result->fetchAll();
 
@@ -2822,6 +2822,7 @@ function fixLpId($connection, $debug)
 
     if (!empty($sessions)) {
         $sessions = array_column($sessions, 'id');
+        $sessions[] = 0;
     } else {
         $sessions = [0];
     }
diff --git a/tests/scripts/fix_lp_id_to_iid.php b/tests/scripts/fix_lp_id_to_iid.php
index 2b22aabb9e..9774560051 100644
--- a/tests/scripts/fix_lp_id_to_iid.php
+++ b/tests/scripts/fix_lp_id_to_iid.php
@@ -20,6 +20,8 @@ $toolTable = Database::get_course_table(TABLE_TOOL_LIST);
 $sessions = Database::select('id', Database::get_main_table(TABLE_MAIN_SESSION));
 if (!empty($sessions)) {
     $sessions = array_column($sessions, 'id');
+    // Add session_id = 0
+    $sessions[] = 0;
 } else {
     $sessions = [0];
 }