Transaction not yet indexed

NAk53Es1osq44b69jUNY612seyFfFdV8E8bLDjAUfSaeaJNpkxvDnrYkhAWQSpGE8j6cB9nDU2sqgCjDn3sS556

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