Transaction not yet indexed

AMMkpMYR4EKNoku5JEcaoxsbWTjsoeqwbkuA8TtRJJX75JzzppZJrGTkMupNMcEu6Zb9bsn7oRmTRdXi7KMPfD6

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