Transaction not yet indexed

21M51FYb7gmU1BZFqPzvAeTfaPVvS5MniAqNSPRbn2Q5D2MqU8LKEb4Hae8zp39g2UBACoTWKuSVFunrRTNSvR6L

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