Implement Soft delete with cascade type DELETE in Spring boot

Question

I've implemented soft delete in my spring boot application. Which looks something like:

Program.java

public class Program{
    //other attributes
    private boolean deletedFlag;

    //getter setters       
}

And in repository of program entity, I'm firing following query to only return the entities, which has deleted flag false.

public interface ProgramRepository{
    //other methods
    Program findByDeletedFlagFalse();
}

So this implementation works perfectly fine. But the problem is, I've an another entity (named 'Major'), in which I've injected list of programs. So major entity looks like:

public class Major{
    //other fields
    List<Program> programs;
    //getter setters
}

Now, when I delete program entities, it still appears in the major, even if they are deleted. So basically my response looks like:

"major":{
      //other fields
      "program": [{
           //other fields
           "deletedFlag": true
       }]
 }     

But the expected behavior should be like if we delete child entity, parent should not list it. So what am I missing here?

Is there any alternative of implementing soft delete in spring boot? I've already seen this: Hibernate Soft Delete using update Cascade, But it seems like the answer using hibernate instead of Spring data JPA.

I've already seen this: Handling soft-deletes with Spring JPA, but it is more aligned to hibernet solution instead of spring data JPA.