Transaction not yet indexed

Amm6JKQ7Ac5FyJNUj4DKXYcNpdPi6K4PDHa3Nv8Bmfqo83VEZ9Wn5Kpebc93acnTdDC7yMBZQXygigKCKyJF894

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