Transaction not yet indexed

1AmmVjnW1ntCgf4qJXovGEdmfWHQfzSP1KkQkt6vsfYQsvJDJxgJ4zdoCSz9v5DKjAywxGAqVqfVQxStaDVGbq6

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