Reindex: black list additional index settings that cannot be copied over

Author: gmarz

src/Nest/Document/Multiple/Reindex/ReindexObservable.cs

@@ -105,8 +105,11 @@ private void CreateIndex(string resolvedFrom, string resolvedTo)
 			var originalIndexSettings = this._client.GetIndex(resolvedFrom);
 			var originalIndexState = originalIndexSettings.Indices[resolvedFrom];
 
-			// work around https://github.com/elastic/elasticsearch/issues/21096
+			// Black list internal settings that cannot be copied over
+			// See https://github.com/elastic/elasticsearch/issues/21096
 			originalIndexState.Settings.Remove("index.provided_name");
+			originalIndexState.Settings.Remove("index.creation_date");
+			originalIndexState.Settings.Remove("index.version.created");
 
 			var createIndexRequest = this._reindexRequest.CreateIndexRequest ?? new CreateIndexRequest(resolvedTo, originalIndexState);
 			var createIndexResponse = this._client.CreateIndex(createIndexRequest);