You see that there exists inventory cost rates with a future start date in the material master data, however you are no able to manually create future dated entries due to error message.
Reproducing the Issue
- Go to Product Data work center
- Go to Materials view
- Edit the relevant material
- Go to the Valuation tab
- Edit cost and make it valid from a future date for the current entries.
You'll see an error as follows: Inventory cost cannot be maintained for future periods
You were able to maintain the future valuation because it was migrated while not active in the system. For active materials, it is not allowed to change valuation in future periods as this would affect postings in the system.
It is recommended not to maintain future dates while migrating inactive materials (valuation in process) as it cannot be changed in the UI (User interface).
This is the standard system behavior.
KBA , AP-SIP , Supplier Invoice Processing , How To