POs hanging in MB5S as GR & IR done on different POs

Hi Gurus,

I have a situation as below -

• Facts of case :
  1. PO#1 (7 qty) & PO#2 (2 qty) are done in USD with reference to USD vendor and GR also done on them in June’2013  
  2. These are linked to SO and upon the GR, goods have also been sold to the customer in June’2013
  3. The vendor however sent the invoice in SGD. To address this,new PO#3 was created for the combined quantity(9 qty) in Dec’2013 with reference to SGD vendor and vendor invoice was done with reference to this PO. The vendor was later paid for this invoice

• Issue :
  1. Since the IR has happened on one PO(i.e latter one done in correct currency) and the GR has happened for wrong POs i.e one’s
     created first i.e USD, both these POs in USD & SGD POs show open in MB5S for quantity variances
  2. Since these events happened in 2013, it is not possible to do any MIGO reversal etc. in 2014
  3. Doing MR11 also results in posting to stock account, but this is not desirable

• Advice/Suggestions :
  1. Is there any approach by which the GR/IR imbalance on these two different currency POs can be corrected without impacting the stock relevant for this PO

Please provide your suggestions on this

Thanks,

Gaurav