Transaction not yet indexed

MM2upCEtvGqR8aUWhzH8HRcJG4tuRpjtoqS22dcWvJRkc4o3YoeD9u5EmLxurm35FUVSqSvP1v5UaRv7tytJkQs

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