The second defense of graduation thesis has no effect on students' graduation; If the first thesis defense fails, as long as you pass the second debate, you can still get the diploma and degree certificate as scheduled, which will not have other effects on students.
In addition, it should be noted that the second debate of graduation thesis here refers to the students who failed or did not participate in the first defense of graduation thesis and made the second defense of graduation thesis; Rather than the second defense of excellent papers. If the excellent papers are selected for the second debate, it will have no effect on students' graduation.