Transaction not yet indexed

AcknFF5WWmx25kijbbA9cqi2WyBpMerRtS8ZXXWVBV2oaHKqYcMSCGLfr6shdokcJyc1fGzcCW5bGGrznvVyqz2

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