AP journal payment - account and offset account cannot be the same

I tried to create a journal payment which has same account and offset account, but got this error: ‘account and offset account cannot be the same’, where is the set up to allow the system to enable account and offset account to be the same? thanks

I have the idea if your purpose just to get the journal posted. you can try it by creating two lines with same account but leaving the offset account blank. First line for debit, second line for credit with same amount.