diff --git a/Neos.ContentRepositoryRegistry/Classes/Command/MigrateEventsCommandController.php b/Neos.ContentRepositoryRegistry/Classes/Command/MigrateEventsCommandController.php
index 56437a286c..6432eb979b 100644
--- a/Neos.ContentRepositoryRegistry/Classes/Command/MigrateEventsCommandController.php
+++ b/Neos.ContentRepositoryRegistry/Classes/Command/MigrateEventsCommandController.php
@@ -133,4 +133,20 @@ public function reorderNodeAggregateWasRemovedCommand(string $contentRepository
         $eventMigrationService = $this->contentRepositoryRegistry->buildService($contentRepositoryId, $this->eventMigrationServiceFactory);
         $eventMigrationService->reorderNodeAggregateWasRemoved($this->outputLine(...));
     }
+
+    /**
+     * Migrates "nodeAggregateClassification":"tethered" to "regular", in case for copied tethered nodes.
+     *
+     * Needed for #5350: https://github.com/neos/neos-development-collection/issues/5350
+     *
+     * Included in November 2024 - before final Neos 9.0 release
+     *
+     * @param string $contentRepository Identifier of the Content Repository to migrate
+     */
+    public function migrateCopyTetheredNodeCommand(string $contentRepository = 'default'): void
+    {
+        $contentRepositoryId = ContentRepositoryId::fromString($contentRepository);
+        $eventMigrationService = $this->contentRepositoryRegistry->buildService($contentRepositoryId, $this->eventMigrationServiceFactory);
+        $eventMigrationService->migrateCopyTetheredNode($this->outputLine(...));
+    }
 }
diff --git a/Neos.ContentRepositoryRegistry/Classes/Service/EventMigrationService.php b/Neos.ContentRepositoryRegistry/Classes/Service/EventMigrationService.php
index be7cfcc629..d2880126d7 100644
--- a/Neos.ContentRepositoryRegistry/Classes/Service/EventMigrationService.php
+++ b/Neos.ContentRepositoryRegistry/Classes/Service/EventMigrationService.php
@@ -25,6 +25,7 @@
 use Neos\ContentRepository\Core\Feature\RootNodeCreation\Command\UpdateRootNodeAggregateDimensions;
 use Neos\ContentRepository\Core\Feature\WorkspaceEventStreamName;
 use Neos\ContentRepository\Core\SharedModel\ContentRepository\ContentRepositoryId;
+use Neos\ContentRepository\Core\SharedModel\Node\NodeAggregateClassification;
 use Neos\ContentRepository\Core\SharedModel\Workspace\ContentStreamId;
 use Neos\ContentRepository\Core\SharedModel\Workspace\WorkspaceName;
 use Neos\ContentRepositoryRegistry\Command\MigrateEventsCommandController;
@@ -810,6 +811,54 @@ public function reorderNodeAggregateWasRemoved(\Closure $outputFn): void
         $outputFn(sprintf('Reordered %d removals. Please replay and rebase your other workspaces.', count($eventsToReorder)));
     }
 
+    public function migrateCopyTetheredNode(\Closure $outputFn): void
+    {
+        $this->eventsModified = [];
+
+        $backupEventTableName = DoctrineEventStoreFactory::databaseTableName($this->contentRepositoryId)
+            . '_bkp_' . date('Y_m_d_H_i_s');
+        $outputFn(sprintf('Backup: copying events table to %s', $backupEventTableName));
+
+        $this->copyEventTable($backupEventTableName);
+
+        $streamName = VirtualStreamName::all();
+        $eventStream = $this->eventStore->load($streamName, EventStreamFilter::create(EventTypes::create(EventType::fromString('NodeAggregateWithNodeWasCreated'))));
+        foreach ($eventStream as $eventEnvelope) {
+            $outputRewriteNotice = fn(string $message) => $outputFn(sprintf('%s@%s %s', $eventEnvelope->sequenceNumber->value, $eventEnvelope->event->type->value, $message));
+            if ($eventEnvelope->event->type->value !== 'NodeAggregateWithNodeWasCreated') {
+                throw new \RuntimeException(sprintf('Unhandled event: %s', $eventEnvelope->event->type->value));
+            }
+
+            $eventMetaData = $eventEnvelope->event->metadata?->value;
+            // a copy is basically a NodeAggregateWithNodeWasCreated with CopyNodesRecursively command, so we skip others:
+            if (!$eventMetaData || ($eventMetaData['commandClass'] ?? null) !== CopyNodesRecursively::class) {
+                continue;
+            }
+
+            $eventData = self::decodeEventPayload($eventEnvelope);
+            if ($eventData['nodeAggregateClassification'] !== NodeAggregateClassification::CLASSIFICATION_TETHERED->value) {
+                // this copy is okay
+                continue;
+            }
+
+            $eventData['nodeAggregateClassification'] = NodeAggregateClassification::CLASSIFICATION_REGULAR->value;
+            $this->updateEventPayload($eventEnvelope->sequenceNumber, $eventData);
+
+            $eventMetaData['commandPayload']['nodeTreeToInsert']['nodeAggregateClassification'] = NodeAggregateClassification::CLASSIFICATION_REGULAR->value;
+
+            $this->updateEventMetaData($eventEnvelope->sequenceNumber, $eventMetaData);
+            $outputRewriteNotice(sprintf('Copied tethered node "%s" of type "%s" (name: %s) was migrated', $eventData['nodeAggregateId'], $eventData['nodeTypeName'], json_encode($eventData['nodeName'])));
+        }
+
+        if (!count($this->eventsModified)) {
+            $outputFn('Migration was not necessary.');
+            return;
+        }
+
+        $outputFn();
+        $outputFn(sprintf('Migration applied to %s events. Please replay the projections `./flow cr:projectionReplayAll`', count($this->eventsModified)));
+    }
+
     /** ------------------------ */
 
     /**