How can we delete old BPM instances

Hi,

I have created BPM later I have found some mistake and deletd existed BPM and I created new BPM. But still it is pointing old BPM istance at run time. But i have chacked in SXI_CHACHE transaction there the BPM is updated properly. How can i deleted old instances of BPM?

Thanks in advance.

Regards,

Sudhakar.