How does lumion import the model?

Because it is overwritten, the solution is as follows:

1. First, open the lumion software in the computer. In the lumion scene, find and click the object icon, as shown in the following figure.

2. Then, in the open object interface, find and click the Import button, as shown in the figure below.

3. Click the Import button, you will see the imported submenu page, and then click Select Object, as shown in the figure below.

4. Finally, in the open object selection interface, it is the previously imported model, as shown in the following figure.