Activating BC SET fails

Hi, experts,

     I have created a BC SET over SAP BCO "ChangeDocumentMandatoryObjectConfiguration" for History Changes.

     When I activate it, this error occurs. And I simply don't know why it is happening.

     Do I really need to report an incident? I simply don't know the cause.

     Looking forward to your kindly advice.

Thanks in advance.

Regards,

Fred.