If you write a novel with the same title as an existing novel, you may face copyright violation. This is because in many countries, copyright protection lasts for decades or even longer, so if the same author uses the same name in the same work, it may be regarded as an act of copyright violation. In order to avoid copyright violation, you should avoid using the same or similar name as an existing work. You can use a different name or create a new name to avoid copyright. In addition, you can also create some unique elements or plots in your work to make your novel different from other works to avoid copyright violation. Of course, in some cases, you may be exempted from copyright violation. For example, if your work is an adaptation or translation and you have obtained permission from the original author, you may have the right to use the title and storyline of the work. However, this situation is not generally applicable, so it is recommended that you first understand the relevant laws and regulations before creating.