10000342 
Message
You cannot delete a base scenario
Diagnosis
You have opened the Budget Scenarios - Setup window, and you have tried to delete a budget scenario in the table. However, one or more budget scenarios or transactions are based on the budget scenario you have tried to delete.
You cannot edit or delete a budget scenario on which budget scenarios or transactions are based.
Note
Whenever you set up a new company, a scenario called the “main budget” is created automatically. You cannot edit or delete a main budget scenario.
End of the note.
Procedure
To set up a new budget scenario:
From the SAP Business One Main Menu, choose
Financials 
Budget Setup Budget 
.In the Budget Scenario Definition window, set the required parameters and choose the OK button.