Create the classes:

package p2;
import p1.*;
public class C extends B {
  public long n(  int a){
    return 0;
  }
}
package p1;
public class B extends A {
  protected long k(  int a){
    return 1;
  }
}
package p1;
import p2.*;
public class A {
  public long m_0(){
    return new C().n(2);
  }
}

apply the rename refactoring to rename n to k.

package p2;
import p1.*;
public class C extends B {
  public long k(  int a){
    return 0;
  }
}


package p1;
public class B extends A {
  protected long k(  int a){
    return 1;
  }
}


package p1;
import p2.*;
public class A {
  public long m_0(){
    return new C().n(2);
  }
} 

The resulting program does not compile.