How To Fix KO340 - Valid to date is in the past - once saved, it cannot be changed

KO340 - Overview

• Message type: E = Error

• Message class: KO - Master data for CO orders

• Message number: 340

• Message text: Valid to date is in the past - once saved, it cannot be changed

What causes this issue?

You changed the validity period for the product cost collector. If you
save the change, the product cost collector is locked.

How to fix this error?

Check your input.

Error message extract from SAP system. Copyright SAP SE.

KO340 - Details

• The SAP error message KO340, which states "Valid to date is in the past - once saved, it cannot be changed," typically occurs in the context of controlling (CO) or project systems (PS) when you are trying to enter or modify a record that has a validity period that has already expired. This can happen in various scenarios, such as when dealing with cost centers, internal orders, or project definitions.
  
  Cause:
  
  Expired Validity Date: The primary cause of this error is that the "Valid to" date you are trying to set or modify is earlier than the current date. SAP enforces this rule to maintain data integrity and ensure that historical data is not altered.
  System Configuration: The system may be configured to prevent changes to certain records once they have been saved, especially if they are linked to financial transactions or reporting.
  
  
  Solution:
  
  Check the Dates: Review the "Valid to" date you are trying