How To Fix S_CUS_IMG_ACTIVITY132 - Table &1 contains forbidden key field ('&2' has > 255 characters)

SAP Error Message - Details

• Message type: E = Error

• Message class: S_CUS_IMG_ACTIVITY - IMG Activity

• Message number: 132

• Message text: Table &1 contains forbidden key field ('&2' has > 255 characters)

What causes this issue?

Table/view &V1& contains key fields which are more than 255 characters
long.

System Response

You cannot use the object in BC Sets, because BC Sets do not support
fields of this length. If these fields are in the table/view key, as in
this case, they cannot be put in BC Sets.

How to fix this error?

This is not a table/view design error. A key field can be longer than
255 characters, but restrictions in the BC Set technology prevent this
table/view being used in BC Sets.
The SAP developer responsible must change the design of the table/view
in the Data Dictionary. Reduce the output length to < 256 characters. If
a maintenance dialog has been generated for the table/view, regenerate
it with the transaction SE54.
<ZH>Note:</>
Test the BC Set functionality, to ensure that the entries are correct.
Create a BC Set for the object.
Check whether the data has been recorded completely in the BC Set
(SCPR3).
Change an entry in the object (SPRO or SM30/34).
Activate the BC Set (SCPR20).
Check whether the values put in the BC Set have been written correctly
into 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.