SAP Message AA169 - Spec.dep.start date not allowed in dep.area & (Please correct)

Diagnosis You have specified a special depreciation start date &V2& indepreciation area &V1&. However, you cannot calculate specialdepreciation in depreciation area &V1&, as a result of the chart ofdepreciation in area &V1&. System Response The system does not allow a special depreciation start date. Procedure Correct the special depreciation start date in depreciation area &V1&.