Hi Pritesh,
If you want to give the corrective effect only in FI, please check if the following could help.
Execute F.05 with "Bal.sheet preparation valuation" box checked. It would post Foreign Currency revaluation but would not reverse it thus re-valuating the transaction only in FI.
e.g. If the invoice is posted with incorrect exchange ratio of 1 USD = 40 INR and you wish to update it in FI to 1 USD = 49 INR.
Maintain correct exchange rate for the posting date. Execute F.05 with "Bal.sheet preparation valuation" box checked.
Now in FI the value of this line item is 1 USD = 49 INR.
If you clear this line item when exchange rate is 1 USD = 51 INR, the system would post 2 INR as exchange rate difference.
Regards,
Ravi Kumar