Transaction not yet indexed

ymmoSYfoF8YjDiQvXqErnmDWPHZ9FBt7BH2e9RhY5nxJsQ4WjcvxbufFg7prkcBoAFqCdoGFHASt9JnQpR8XkxZ

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