Transaction not yet indexed

mdk5Y18iCFjzGShw4dRfaqMt2Y4GfCEFYXiVTuzGiJMDJ49b5HuFCTf1UzcJ8io9H3WExd1v6rxUGcABqu8gLL1

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