Transaction not yet indexed

AcoupTauf2tuPHqDDPQajtu2VisWsT9UpBPkad2jPryTtCmDAUEGx9n4BHJDCSLTDXjMH6ZHwsVEwnAZkqhRzA2

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