When trying to delete a subtask, I get an error stating "Reason: Indexing Service: the parameter is incorrect". I believe this is because the tasks were started when EV was in DR (running on another server). I assume this is stored somewhere in a EV database. The tasks were stopped (and not deleted), then a failback was done. I assume that the mentioned archive's index is now associated with another indexing service, which prevents the deletion.
If anyone knows what the check, please let me know.
thanks in advance,