Choose 'Acquisition only allowed in capitalization year'

What causes this issue?

The ordinary depreciation key represents either the unit-of-production
method of depreciation or the sum-of-the-years digit method of
depreciation.
When either of these is the case, you are required to choose
'Acquisition only allowed in capitalization year'.

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?

Correct your specifications.

Error message extract from SAP system. Copyright SAP SE.