SAP Message AC012 - Chart-of-depreciation-dependent assignment to asset class &1 not possible

Diagnosis
You tried to assign chart-of-depreciation-dependent data to asset classV1.

System Response
The assignment is not allowed.

Procedure
In order to be able to assign chart-of-depreciation-dependent data toasset class &V1&, the following conditions have to be met. You have tohave already
Defined at least two active charts of depreciation
Assigned asset class &V1& to more than one chart of depreciation
However, at the moment this asset class is only assigned to chart ofdepreciation &V2&.