MC-31304: [ElasticSearch] Exception on catalog search result page

Author: SmVladyslav

app/code/Magento/Elasticsearch/Model/Adapter/Elasticsearch.php

@@ -344,6 +344,7 @@ public function updateAlias($storeId, $mappedIndexerId)
         // remove obsolete index
         if ($oldIndex) {
             $this->client->deleteIndex($oldIndex);
+            unset($this->indexByCode[$mappedIndexerId . '_' . $storeId]);
         }
 
         return $this;