If you want to create a Test Plan with the scope, which is similar to the Test Plan you already have, you can create a copy of the existing Test Plan.
Go to the Test Plans module
Move your mouse to the Actions column for the target Test Plan you want to duplicate
Click on Clone Test Plan icon:
Test Plan configuration window will be displayed. You will be able to modify the following information:
Test Plan Name
Test Plan Dates
Option to copy the Assignment of Task within the Test Plan
Click Save and a copy of the Test Plan will be created.
Test Plan state after being copied
When duplicating the Test plan the following information is copied:
Tasks Assignments (if the checkbox is checked when copying the Test Plan);
When duplicating the Test plan the following information is NOT copied:
Test plan status → the status is set to New
Execution information (Run Logs) on the Test plan and the scope item → Status of all the scope items is set on Not started