text: ALTER TABLE public.mlreef_project
      ADD COLUMN IF NOT EXISTS forked_from_id UUID;
  
  ALTER TABLE public.mlreef_project
      ADD CONSTRAINT mlreef_project_forked_from_id_fk FOREIGN KEY (forked_from_id)
          REFERENCES mlreef_project (id)
          ON DELETE SET NULL
          ON UPDATE CASCADE
          NOT DEFERRABLE;
  
  