Remove extension from solr if deleted

html/typo3conf/ext/ter_fe2/Classes/Controller/RegisterkeyController.php

@@ -226,6 +226,11 @@ class RegisterkeyController extends \T3o\TerFe2\Controller\AbstractTerBasedContr
             // Deleted in ter, then delete the key in the ter_fe2 extension table
             if ($this->terConnection->deleteExtensionKey($extension->getExtKey())) {
                 $this->extensionRepository->remove($extension);
+                // remove from index queue
+                if (ExtensionManagementUtility::isLoaded('solr')) {
+                    $indexQueue = GeneralUtility::makeInstance(Queue::class);
+                    $indexQueue->deleteItem('tx_terfe2_domain_model_extension', $extension->getUid());
+                }
                 $this->addFlashMessage(
                     '',
                     $this->translate('registerkey.deleted', array($extension->getExtKey())),