From 22d6c82df80ee90ed259fe1ada7f54aca18ba557 Mon Sep 17 00:00:00 2001
From: Melanie Treitinger <melanie.treitinger@ruhr-uni-bochum.de>
Date: Wed, 6 Dec 2023 11:32:39 +0100
Subject: [PATCH] fix error when otherindex does not exist

---
 classes/local/manager/workflow_manager.php | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/classes/local/manager/workflow_manager.php b/classes/local/manager/workflow_manager.php
index b30d54e7..486dc295 100644
--- a/classes/local/manager/workflow_manager.php
+++ b/classes/local/manager/workflow_manager.php
@@ -366,12 +366,14 @@ public static function change_sortindex($workflowid, $up) {
             [
                 'sortindex' => $otherindex, ]
         );
-        $otherworkflow = workflow::from_record($otherrecord);
+        if (false !== $otherrecord) {
+            $otherworkflow = workflow::from_record($otherrecord);
+            $otherworkflow->sortindex = $index;
+            self::insert_or_update($otherworkflow);
+        }
 
         $workflow->sortindex = $otherindex;
-        $otherworkflow->sortindex = $index;
         self::insert_or_update($workflow);
-        self::insert_or_update($otherworkflow);
 
         $transaction->allow_commit();
     }