i want begin_balance_dr = 0 and begin_balance_cr = 0 after purge
1- i have a data in a specific ledger.
2- i want to purge data from this ledger (balances and journals) .
3- in the last period which i purge a data.
4- when run ytd trial balance i found values for dr and cr.
5- i need a method to transfer the values for dr and cr to 0.