Hi John.
In "Specify use of Parallel Currency" setup your currencies type/Valuation view.
In Currency Type/Valuation View, against area 31 maintain it for 31 (Group Currency Group Valuation) and against area 40 maintain 40 (Hard Currency). Transfer of Deprecation terms setup from Deprecation
area “01”. Setup like below.
Now go to below
Maintain your currency as per requirement and see if changes are updated as per above configuration (I mean valuation id is "01" for your depreciation area, try to execute your transaction and let me know if it’s working.
After that go to define depreciation area and see if your depreciation area setting for 01, 31 and 40 is same. Please try to check in Sandbox first.
Please mark it as correct if your problem resolves, so it would be useful for other as well.
Thanks and Regards,
Sudhir Harale