Replicide.

The act of murdering one's own clone or magical or scientifically created duplicate. (ex: Thomas Riker from Star Trek: The Next Generation is created in a transporter accident.) Falling somewhere on the moral ambiguity scale between murder and suicide, most legal systems do not have a consistent precedent in place for determining whether or not this action is criminal or self-determination.

William Riker would have been better off doing a Replicide.