Transaction not yet indexed

mTkMM4rDDh4ueWKoAvYxP3KPCEb5oDa6SfLhwekPdqeRHuXjvjzqEeYQBjb9aGQrKvj3TRGi2vx6V5HuPUN9To4

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