Transaction not yet indexed

AmbkfpZa7uBVdWQyn2JbYjWLtKEWCGeTGo2kzRbdEKvWuNjpQ2iGhQxSpBE4jSfoouyieRdpyFYsMmmYujhR99T

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