SAP GRC PC Data Source - Wrong Connector - Unable to change as already in use.

Dear All,

a customer has SAP GRC PC 10.1.

A Data Source was created and assigned to a business rule

The business rule was assigned to a Control

The Control is attached to a Subprocess

The Subprocess is attached to an Organisation.

All good excep the connector in the Data Source is for the wrong system.

The customer is unable to change the Connector in the data source as it is. The following message is shown when attempting to change the connector in the Data Source:

"Data Source has been assigned to at least one Business Rule already"

The Business Rule cannot be deleted as "it is assigned to control until 31.12.9999"

Any suggestions?