Transaction not yet indexed

ACKx5MXCWVk6dgT119JDHjD7b3Bf3DMN5WgdCNRAypKeZUPJEp1zwei8LAqZURmZLQDJssCKR2e9wPWKm2u7ZSC

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