Transaction not yet indexed

Nmm6hbGJ7du2zjNNcDkpjVrfQtdYVq4QbcWHZyeX2fRPRNHUZECfVWnRPwsF3izFjRbejgwym2teCuRjsoC8xQM

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.