Diagnosis
You tried to change currency &V1& of depreciation area &V3& in companycode &V2&.
However, there are already assets with values in depreciation areaV3. therefore, it is no longer possible to change currency v1 indepreciation area &V3&.

Procedure
If company code &V2& is still in test status, you can reset the companycode and all the asset values in it.