I have installed FFA Accounting package in my org and now i have write some code on that, so when i tried to write the Test class so in my condition i want billing contract as active, but when i set the Billing Contract status field active in my test class then i got the error which is 'The status of a contract can only be changed by Billing Central' .
Is anybody aware of this how i can update that as i have checked there is no API defined so i can access that and neither its method are globally define.