Transaction not yet indexed

mam1rZuEoqzTftJvuGhHoDtaqy86Qrk7HqdUP6vah1pF6zsejfYzviWe1krFhCRcxJ9K1z9ziF8xnpoEyfzMDG1

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