Transaction not yet indexed

UM423ZbmGKS42npFCf6nU1MLaCz6BCk5oMak9rEffqBLuKEU2v3MFRkLTKgRbhpsva7i9RCdnbkPcmB8VrXS4fQ

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