Material Price Differences between CoCd and Grp Curr/Grp Val in Material Ledger

Hello Experts,

Several of the materials we use have price differences between CoCd currency (Currency Type 10) and Group Currency/Group Valuation currency (Currency Type 31).  We have tried fixing these differences using MR21, MR22, etc.  But the closing entries keep posting price difference rollups to these materials and thus ruins our effort.

Is there any way to fix the price differences in these currencies?

Cheers,

TD