SAP Message TU233 - Contract account &1 for contract &2 has payment plan procedure

Diagnosis You have attempted to create a budget billing plan for contract &V2&. This is not possible, because the value in the BB procedure(budget billing procedure) field in contract account &V1& no longerrepresents a budget billing procedure (1 or 2). It is therefore notpossible to create a budget billing plan. You can only create a paymentplan (procedure 3) using Simulate Payment Schedule. System Response Procedure If you still want to create a budget billing plan for contract &V2& youmust change the budget billing procedure in the contract account. Notethat you can only change the budget billing procedure if no budgetbilling plans already exist for the contract account.