Create a Reversing Journal Entry for the scenario as follows.
Go to Gateway of Tally > Accounting Vouchers > F10: Rev Jrnl
Select Reversing Journals from the list.
Debit Depreciation and enter the amount
Credit Provision for Depreciation
Enter Narration if any.
Accept the Voucher.
More:
Display/Alter a Reversing Journal
Using Scenarios in Statements and Reports