In this solution, a user might receive the error, Error: A superset object with that key already exists, when posting from Administration. The answer below explains what could cause this error.
1. Ensure there are no projects that would be posting that could violate an account posting rule 2. If instances are found, adjust the project record to allow the transaction to post, or change the not yet posted transaction 3. Save the project 4. Exit and sign out and sign back in