How To Fix S_CUS_IMG_ACTIVITY204 - Table &1 contains forbidden key field ('&2' not maintainable)

SAP Error Message - Details

• Message type: E = Error

• Message class: S_CUS_IMG_ACTIVITY - IMG Activity

• Message number: 204

• Message text: Table &1 contains forbidden key field ('&2' not maintainable)

What causes this issue?

You cannot maintain key field '&V2&' in table/view &V1& by using this
table/view.

System Response

You cannot use the object in BC sets because you must be able to
maintain all fields.

How to fix this error?

This is an incorrectly designed table/view . The design of the
table/view must be changed by the (SAP) developer responsible in the
Data Dictionary before the table/view can be used in BC sets. To do
this, either the affected field must be removed from the key, or the
Basis table of the field must be related to the primary table of the
table/view by using a suitable foreign key relationship. If a
maintenance dialog was generated for the table/view, then you must
regenerate it afterwards by using transaction SE54.
<ZH>Note:</>
To ensure that the change was successful, we recommend that you also
test the BC set functionality:
Create a BC set for the respective object.
Check whether the data was recorded completely in the BC set (SCPR3).
Change an entry in the respective object (SPRO or SM30/34).
Activate the BC set (SCPR20).
Check whether the values stored in the BC set were written correctly to
the table/view.

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 S_CUS_IMG_ACTIVITY204 - Table &1 contains forbidden key field ('&2' not maintainable) ?

  The SAP error message S_CUS_IMG_ACTIVITY204 indicates that there is an issue with a configuration table in the SAP system. Specifically, it means that the table you are trying to maintain contains a key field that is not allowed to be modified or maintained in the current context. The error message typically looks like this:
  Table &1 contains forbidden key field ('&2' not maintainable)
  Cause
  The error is usually caused by one of the following reasons:
  
  
  Key Field Restrictions: The key field (&2) in the specified table (&1) is defined in such a way that it cannot be changed or maintained through the current transaction or configuration activity. This is often due to system settings or restrictions placed on certain fields to maintain data integrity.
  
  
  Incorrect Configuration Activity: You may be trying to perform an action that is not allowed for the specific configuration activity you are in. For example, you might be trying to change a field that is meant to be system-generated or is controlled by another process.
  
  
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to make changes to certain key fields in the table.
  
  
  Solution
  To resolve this error, you can take the following steps:
  
  
  Check Table Definition: Review the definition of the table (&1) in the Data Dictionary (transaction SE11) to understand which fields are key fields and their properties. Look for any restrictions on the key field (&2).
  
  
  Use the Correct Transaction: Ensure that you are using the correct transaction or configuration activity to maintain the data. Some fields may only be maintainable in specific transactions.
  
  
  Review Documentation: Check the SAP documentation or help files related to the specific configuration activity you are trying to perform. This may provide insights into which fields are maintainable and which are not.
  
  
  Authorization Check: Verify that you have the necessary authorizations to make changes to the table. You may need to consult with your SAP security team to ensure you have the appropriate roles assigned.
  
  
  Consult with SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support or your internal SAP team for further assistance. They may have additional insights or solutions based on your specific system configuration.
  
  
  Related Information
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE80 (Object Navigator), and SPRO (SAP Reference IMG) for configuration activities.
  SAP Notes: Search for SAP Notes related to the specific error message or the table in question. SAP Notes often contain solutions or workarounds for known issues.
  Community Forums: Consider checking SAP Community forums or other online resources where SAP professionals discuss similar issues. You may find solutions or suggestions from others who have encountered the same error.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.