From b8a0ac4808f29b8010acd6d019d3d4dd6ffa376a Mon Sep 17 00:00:00 2001
From: Stefan Hanauska <stefan.hanauska@csg-in.de>
Date: Wed, 9 Nov 2022 19:32:45 +0100
Subject: [PATCH] MDL-76258 mod_lti: Reset clientid after restore

---
 mod/lti/backup/moodle2/restore_lti_stepslib.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mod/lti/backup/moodle2/restore_lti_stepslib.php b/mod/lti/backup/moodle2/restore_lti_stepslib.php
index 5f4dac2ca6a..bd16ec55731 100644
--- a/mod/lti/backup/moodle2/restore_lti_stepslib.php
+++ b/mod/lti/backup/moodle2/restore_lti_stepslib.php
@@ -48,6 +48,7 @@
 
 defined('MOODLE_INTERNAL') || die;
 
+use mod_lti\local\ltiopenid\registration_helper;
 /**
  * Structure step to restore one lti activity
  */
@@ -134,6 +135,9 @@ class restore_lti_activity_structure_step extends restore_activity_structure_ste
         $this->newltitype = false;
         if (!$ltitypeid && $data->course == $courseid) {
             unset($data->toolproxyid); // Course tools can not use LTI2.
+            if (!empty($data->clientid)) {
+                $data->clientid = registration_helper::get()->new_clientid(); // Need to rebuild clientid to ensure uniqueness.
+            }
             $ltitypeid = $DB->insert_record('lti_types', $data);
             $this->newltitype = true;
             $this->set_mapping('ltitype', $oldid, $ltitypeid);