Delete flag not possible for asset class & chart of dep. &

What causes this issue?

Chart of depreciation &V1& in asset class &V2& cannot be deleted.

System Response

The system has determined that asset &V4& exists in company code &V3&.
Therefore, you cannot mark the chart of depreciation for deletion.

How to fix this error?

You will have to reorganize the assets, before you can mark the chart
of depreciation for deletion.

Error message extract from SAP system. Copyright SAP SE.