Opening balance changing in tally

Dear Sir / Madam/ frds, 

One of the assessee had made some mistakes in tally, so that its opening balance of many ledgers during P.Y. has been changed. Remaining all other transactions, payments & receipts are posted correctly. Now I have to change the opening balance of wrongly entered ledgers as in the actual books of accounts. If I directly try to change it, it shows "Difference in opening balance". Then do I change it. Plz share your ideas please....

Thanks / Maya..