In area &, you can only post manual dep. up to the amount &

INCLUDE 'AA_AFA_ERROR' OBJECT DOKU ID TX LANGUAGE EN

What causes this issue?

This posting cannot be performed, since manual depreciation can only be
posted in the amount of &V2& in area &V1&.

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?

Check the transaction type entered, or change the posting amount.
Caution: If the amount concerned is 0, this could be the result of two
situations:
The asset does not have any net book value; in this case, you should
check the transaction as described above.
The asset has a depreciation key with automatic depreciation
calculation. However, if you want to include depreciation in addition
to the automatically calculated depreciation, it has to be unplanned
depreciation.
Otherwise, you should use a depreciation key that does not calculate
automatic depreciation (SAP-supplied key: MANU).

Error message extract from SAP system. Copyright SAP SE.