Please maint. asset value date. Line item requires asset value date.

What causes this issue?

You did not enter an asset value date. Every transaction in Asset
Accounting requires a value date.
You are working with an asset under construction with line item
management, and you entered an incorrect transaction type (such as 100)
for line items from previous fiscal years.

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?

Enter an asset value date. The value date must be between the &V1& and
the &V2.
For line items from previous fiscal years, use transaction type 900
(acquisitions) or 910 (down payments). For these transactions, the
asset value date has to be the beginning of fiscal year &V1&.
If you want to delete the transaction, use the "delete line items"
function.

Error message extract from SAP system. Copyright SAP SE.