Encumbrance balance amount from 11i to R12

Hello,

We migrated  from 11i to R12.  We have been using encumbrances to control  budget amounts. in 11i and in R12.

Since we are in R12, the encumbrance types have been modified to  Commitment, Obligation and Invoices, However, in 11i the types were different. So, now we have different balance amounts for the same encumbrance account.

We have to reconcile many reports to get the real picture of the accounts.

Is there a way to transfer the balance  from GL_balance (or other) of the 11i encumbrance types  to the R12 ones.  As no other transaction is done to the 11i ones,  transferring balances amount for each remaining periods  looks to be a solution.