How To Fix PSZ1018 - &1 must not be defined in the key column

SAP Error Message - Details

• Message type: E = Error

• Message class: PSZ1 - PS Payment Planning: Function Group KPP_PSZ

• Message number: 018

• Message text: &1 must not be defined in the key column

What causes this issue?

You have defined &V1& as key column. Only the <LS>commitment item</>
and <LS>transaction currency</> may be defined as key columns.

System Response

The layout cannot be saved.

How to fix this error?

Delete the column with characteristic &V1&.

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 PSZ1018 - &1 must not be defined in the key column ?

  The SAP error message PSZ1018 typically indicates that there is an issue with the configuration of a key field in a particular context, such as a project system (PS) or a related module. The message suggests that a specific field (denoted by &1) is incorrectly defined in a key column, which can lead to inconsistencies or errors in data processing.
  Cause:
  
  Incorrect Configuration: The field mentioned in the error message is likely defined as a key field in a table or structure where it should not be. This can happen during the configuration of project definitions, WBS elements, or other related structures.
  Data Model Issues: The data model may have been altered, leading to a situation where a field that should not be a key is being treated as one.
  Custom Development: If there are custom developments or enhancements in the system, they may inadvertently cause this error by misconfiguring key fields.
  
  Solution:
  
  Check Configuration: Review the configuration settings for the project or the specific area where the error occurs. Ensure that the field in question is not set as a key field in the relevant tables or structures.
  Adjust Key Fields: If the field is incorrectly defined as a key, you may need to adjust the configuration to remove it from the key fields. This typically involves accessing the relevant customizing transaction (e.g., OPUK for project definitions) and modifying the settings.
  Review Custom Code: If there are custom programs or enhancements, review the code to ensure that it is not incorrectly treating the field as a key. Adjust the logic as necessary.
  Consult Documentation: Refer to SAP documentation or notes related to the specific module you are working with for any known issues or additional guidance.
  Testing: After making changes, perform thorough testing to ensure that the error is resolved and that there are no unintended side effects.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  Transaction Codes: Familiarize yourself with transaction codes related to project system configuration, such as CJ01 (Create Work Breakdown Structure), CJ02 (Change Work Breakdown Structure), and others.
  Community Forums: Consider searching or posting in SAP community forums or support channels for additional insights from other users who may have encountered the same issue.
  
  If the problem persists after following these steps, it may be beneficial to engage with SAP support for further assistance.