Transaction not yet indexed

AmMJBGd9twbpnG57xRbGhQzAJkGnGijWf4BZD6yADZjvQ6S7dSYshUCyoUgHM35tFzv9qh3UUwZFPAjpPmLJjkB

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