Begin by opening the Floor View, which can be found in the Level Navigation tab located at the top right.

After you have entered the Floor View, proceed to the Global Settings and Preferences section on the left bottom of your screen.

Within the Global Settings and Preferences, you'll find an option called "Floor Settings."

In the Floor Settings, you'll notice a parameter called "Tracing Background." Click on the drop-down menu located next to it. And select the "DWG File" tab.

Look for "Remove Existing DWG" under that and select the same.

Your imported drawing will be deleted.