Hi Mona
The stock upload in different valuations with COGM BF is still a unclear process. My recommendation i s send a message to SAP via the marketplace about this stuff, Im 100% sure they will give you feedback.
This is just an idea, validate carefully the procedure:
1. Upload stocks with the value of the 'parallell valuation'., this process hit both both ledgers eg IFRS and GAAP.
2. Close the COGM Parallel valuation in the AVR.
3. Do MR22 with the difference between both ledgers.
4 Close the Principal valuation in ML.
again, test carefully!
Arturo.