Transaction not yet indexed

So51PcEGffYAgnTc4dPcaHKZpZ4M3Qt3Z1xyTSPNnSpJ4Zqn4GVcjCma2oh61ZptG7CK7QtmBJAFWeGjCdkT9z4

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