It doesn't matter. The opening report only lays the foundation for the paper. It can explain the core content of the paper, but it can't bind the paper. In fact, it is normal to make changes when writing a formal paper. My graduation thesis is quite different from the topic. On the one hand, I will encounter many practical difficulties when I start my work, which I can't meet when I open the topic. On the other hand, with the deepening of the work, you may find that the previous ideas are unreasonable or have better ideas.