Renew a certificate with the same thumbprint

Hello All

We are using a Standalone CA on Windows Server 2003.

We are renewing a client certificate to extend the validity period.  The client certificate is renewed succesfully and the validity period is extended but the client certificate now has a new thumbprint.  In our application we are using the thumbprint of the client certificate for custom validation.  Is there a way to renew the client certificate with the original thumbprint?

This is my .inf file

[Version]
Signature= "$Windows NT$"

[NewRequest]
RenewalCert="9f 2a ad cb b0 c2 72 12 33 7a e2 2a f9 5e 1f 48 ee d8 85 20"

Thanks
Andy