I want to add an index to an existing index using Setup/UpgradeSchema: $connection = $setup->getConnection(); $tableName = $setup->getTable('sales_order_grid'); $indexName = 'sales_ordergrid_netsuite_id'; $columnName = 'netsuite_id'; $connection->addIndex( $tableName, $indexName, $columnName, MagentoFrameworkDBAdapterAdapterInterface::INDEX_TYPE_FULLTEXT ); It’s creating new insted of adding to existing index. How can I add an index in existing(“FTI_65B9E9925EC58F0C7C2E2F6379C233E7”) index? Thank.