Changing instance.id of J2EE stack

Hi,

We copied a SAP CRM 2007 system by using database and file copy method. The system is opened successfully on the destination side with different hostname and SAP instance number, for both ABAP and JAVA stack. But the Java instance ID came wrong, because when we calculate the instance id, it is different from correct one;

Wrong: instance_ID96721

Correct: instance_ID335584

Is there anyway to change "instance_ID" on the Java stack, manually?

Thank you