Generally speaking, the preliminary examination in colleges and universities will be arranged 5-6 weeks before the defense, or even longer, so that teachers have enough time to check the examination results and inform students to revise them. So, don't worry if the first test fails. After the graduation thesis is revised, the final defense will not be affected after the second submission is qualified.
The second revision is not bad, but I am afraid that it will affect my defense and postpone my graduation. If the first test is not taken seriously, then the second test must be taken seriously. In short, the school will not deliberately ask you not to graduate unless you give up on yourself. As long as it is carefully revised, it is basically no problem to submit it after it is checked by the duplicate checking software.