Transaction not yet indexed

Mmn99pubyPoaDX9GXu89PsPyU1u9MV5tZexfpTye7YJKGcWuVMPf2fSpsmQ7E5S4sHkywTXoVHZLWvWc2WGCPo4

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