Transaction not yet indexed

5So6BV9u3B4UoX1P3xAPKhSBcTqP2fbPd3EMaBGkBNU2uTcEtnEJ9uQMFcg4vbRetnpd516bnwsvpPUPUJChEeS2

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