Contact Point Unique ID Groovy Custom Code

Good morning, 

We want to make the Contact Point ConflictID field unique and non-repeatable, using Groovy code for this. But searching, we couldn't find how to do it. 

The final idea is: 

1) Avoid duplicates 

2) If we eliminate the contact Point we can reuse the unique ID of that conflictID again. 

I also attach an example of the code we wanted, but in the Address object. This is a Before Insert: 

 def vo = newView('Address'); 

def view_Criteria = newViewCriteria(vo); 

def view_criteria_row = view_Criteria.createRow(); 

def view_condition1 = view_criteria_row.ensureCriteriaItem('Comments'); 

view_condition1.setOperator('='); 

view_condition1.setValue(Comments);