Transaction not yet indexed

MdkMbzFYR2VYbTvrFbMp4uF1uinatxjA3mQkmZvWwGLShHnZw2zudHm9xpPW4Zm4uM1cSTcykV3zKHuhHG1nrtp

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