How To Fix CM_SUB_DATA019 - Value assignment type &1 allows one instance; inst. exists in the future

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_SUB_DATA - Substance Data (Header, ID, Reference, Materials)

• Message number: 019

• Message text: Value assignment type &1 allows one instance; inst. exists in the future

What causes this issue?

In Customizing, it is defined that the value assignment type &v1& can
only have one instance. No valid instance exists for the key date, but
there is one in the future.

System Response

The value assignment type cannot be displayed.

How to fix this error?

If you need to create a data record, first delete the records with the
validity in the future.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CM_SUB_DATA019 - Value assignment type &1 allows one instance; inst. exists in the future ?

  The SAP error message CM_SUB_DATA019 indicates that there is an issue with a value assignment type that allows only one instance, but there is already an existing instance that is set to a future date. This typically occurs in the context of configuration management or master data management, where certain value assignments are restricted to a single instance for a given time period.
  Cause:
  
  Single Instance Limitation: The value assignment type is designed to allow only one active instance at a time. If there is already an instance defined for a future date, the system prevents the creation of a new instance.
  Future Date Assignment: The existing instance is set to start in the future, which means it is still considered valid and active, thus blocking any new assignments for the same value assignment type.
  
  Solution:
  
  Check Existing Instances: Review the existing instances for the value assignment type in question. You can do this by navigating to the relevant configuration or master data transaction in SAP.
  Adjust Dates: If the existing instance is not needed, you can either delete it or adjust its validity dates to make room for the new instance. Ensure that the new instance's start date does not overlap with the existing one.
  Change Value Assignment Type: If your business process requires multiple instances, consider whether the value assignment type can be changed to allow multiple instances. This may involve configuration changes in the system.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on managing value assignments and understanding the implications of the configuration settings.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may need to use specific transaction codes to view or edit value assignments (e.g., CMMT, CSTP, etc.).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  User Authorization: Ensure that you have the necessary authorizations to view and modify the value assignments in the system.
  Testing Changes: After making any changes, it is advisable to test the new configuration in a development or quality assurance environment before applying it to production.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.