SAP Message UA_INV_VALUATION004 - Inventory price cannot be changed in period &1 year &2

Diagnosis
You are attempting to set a new inventory price in period &v1& of fiscalyear &v2&. You can only do this for the current period and the previousperiod.

System Response
The inventory price and inventory value are not changed.

Procedure
Check the Valid From date of the price and correct your entries ifnecessary.