workflow- how to delete the entry in inbox

Hi,

I had the entry open from my inbox. The same entry was then opened by another sap user to modify. So I received the modified entry in my inbox (at that moment, it showed I received JE 1000000138 twice). I open the modified entry, and I approved it. Then I realize I have the "old version" of the entry still in my inbox, but I cannot delete it from my inbox. as per my needs i want delete the old entry, is it possible? if possible please explain me step by step.

Regards,

Revoori