Transaction not yet indexed

51873LubCsvpqFi3dn5pYHxFs2MmVsWfWgqxqfJ8L3TGGW9gjpfvQ2AM31YjRKqef3URkRUTmDJZJ6qTcCiMxMoS

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