how do you terminate a prenuptial agreement in NY state

To the extent the agreement was set up and executed correctly, it should be treated as a valid and enforceable contract. Unless the agreement itself contains terminating events, to the extent the goal was to be relieved of the contract in its entirety, there are some contract principles that could be reviewed to see if they apply to your situation to allow for rescission. Some examples are fraud, coercion, unconscionability and mutual mistake of fact. Perhaps it is only a portion of the agreement that is objectionable and, as a result, there may be a way to negotiate or otherwise work around the particular problem.

I want to execute one in Philadelphia, PA