Duplicate AR entries in GL

Hi, We are migrating the AR data from one operating unit to a new operating unit. All the closed and open transaction are going will be moved.Please let me know the following: All the closed transactions are already transfferend and posted to GL, now if we move them to the new operating unit a new number will be gererated with status as open . Now if we are going to run the create accounting the a new entry will be transffered and posted to GL. So , there is a case that duplicate entries will be generated in GL with