GRIR Clearing (old items)

Dear all,

could someone make a suggestion on how to clear open items on the GRIR account that are over 6 months old. MR11 is run on a monthly basis, yet I have some open items in my reconciliation dating back until 2003. I would like to get rid of them but are not able to make manual postings on the GRIR account.

Sincerely,

Lucas