[BUGFIX] Skip unprocessable pages in redirect slug update hook

Resolves: #102374
Relates: #102140
Releases: main, 12.4
Change-Id: Ib3e1f60080c9e1c7a7839aa2fcb90f9d91d6a4ed
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81668
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>

typo3/sysext/redirects/Classes/Hooks/DataHandlerSlugUpdateHook.php

@@ -76,10 +76,11 @@ public function processDatamap_afterDatabaseOperations(string $status, string $t
         $persistedChangedItem = $this->persistedChangedItems[(int)$id] ?? null;
 
         if (
-            $table !== 'pages'
+            $persistedChangedItem === null
+            || $table !== 'pages'
             || $status !== 'update'
             || empty($fieldArray['slug'])
-            || $persistedChangedItem?->getOriginal()['slug'] === $fieldArray['slug']
+            || $persistedChangedItem->getOriginal()['slug'] === $fieldArray['slug']
             || $this->isNestedHookInvocation($dataHandler)
         ) {
             return;