if (response.isExists()) {
                final GetAliasesResponse getAliasesResponse = client.admin()
                        .indices()
                        .prepareGetAliases(getUpdateAlias(index))
                        .execute()
                        .actionGet(suggestSettings.getIndicesTimeout());
                getAliasesResponse.getAliases().keySet().forEach(prevIndices::add);