SAP Note 25120 - AS91, unplanned deprec., takeover in fiscal year

Symptom:

During an old data transfer during the fiscal year, unplanned depreciation (or manual depreciation) posted for a calendar period during the year in the previous system is to be transferred for specific areas.
Using AS91, the unplanned depreciation (or manual depreciation) POSTED during the fiscal year can be entered for the area in question without any problems.
The transfer of the also necessary PLANNED unplanned depreciation amount via AS91 - transfer values - movements Transactions 64x, asset value date in the calendar period during the fiscal year is, however, not possible since either error message AA207 (Mty only for special areas ... ) occurs or the area to be posted to is not ready for input.
If the PLANNED unplanned depreciation amount is missing, then the posted transferred unplanned depreciation is cancelled by the depreciation posting program during the next posting run (reversal).

Other terms

Old data transfer AS92,
manual depreciation

Solution
Post the planned value for the posted unplanned depreciation in the calendar period during the fiscal year via Posting - Other with the corresponding Transactions 64x and an asset value date during the fiscal year (or Transactions 60x, 61x, 62x, 63x for manual depreciation).