Unable to make field Account Group changeable on Supplier CR

To make Account Group changeable on UI there is a configuration activity given in the Supplier Configuration document provided by SAP.

" You can specify change request types to enable the change of account groups. In the

corresponding change requests the field Account Group will then be changeable instead of

being a mere display field.

Run the Customizing activity Specify Change Request Types to Enable Account Group

Change under : Master Data Governance -> Master Data Governance for Supplier ."

When I try to add my custom Change Request Type here and then save, system gives error message as shown below:

If anyone has resolution for this issue. Please share.

Let me know what else I need to verify to check the cause.

Thanks,

Swati Verma