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.