diff --git a/classes/import/sessions.php b/classes/import/sessions.php
index 24ff0d2..f22495b 100644
--- a/classes/import/sessions.php
+++ b/classes/import/sessions.php
@@ -328,9 +328,9 @@ class sessions {
 
         // Count of sessions added.
         $okcount = 0;
-        $groupids = array();
 
         foreach ($this->sessions as $session) {
+            $groupids = array();
             // Check course shortname matches.
             if ($DB->record_exists('course', array(
                 'shortname' => $session->course