Hi Sebastian,
For payables/receivables you cannot reverse back dated as the open item itself dont exist before the proposed posting date of ap/ar. ( may be you just click on 'reverse' button for the same current year before changing the migration date )
For G/L Migration, pls note: For all the G/L Migration the offsetting entry is always Initial Data Carry-forward Asset Account only ( this is only migration purpose )
Your scenario:
Migrated G/L Balances with wrong migration date(current year)
Step 1: Re-migrate with sign change in all the lines ( from + to -, vice versa )
Step 2: Change Migration posting date ( previous year )
Step 3: Again Perform the Migration with the correct values & signs
Review postings, the balances will now be reflecting it for changed migration posting date (previous year)
I have performed same steps and system allows migration & balances were updated correctly in the previous year now.
Please mark this thread as answered/helpful if your query is answered.
Thanks
Lokesh Sharma