I am wondering if anyone can help me with an issue we are facing. We are trying to add a parent-child relationship between 2 tables in the database that already contain data. We are able to add the new relationship property to the required data classes, and set the desired cardinality. We have also included code that will add the relationship using the Insert() method to new data that comes in.
The problem we have is how do we add the relationship to data that already exists in the database?