You cannot change the currency type in chart of deprec. &

What causes this issue?

You tried to change depreciation area &v3& in company code &v2& and
chart of depreciation &v1& in order to manage parallel currencies.
However, assets with values already exist in depreciation area &v3&.
Therefore, you cannot change the currency type in depreciation area
&v3&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

If your company code has test status, you can reset the company code
and all the asset values in it.

Error message extract from SAP system. Copyright SAP SE.