You migrate one or more Planner plans and get the following warning messages:
A plan with the same name already exists in the destination. Note that your plan will not merge with the existing plan, it will copy as a new plan. We recommend renaming your plan before copying.
When you migrate a Planner plan that already exists, or if you have a plan with the same name in the destination, ShareGate's migration tool will create a new copy of your source plan in the destination.
The new plan in the destination will have the same name as the existing one. Microsoft handles URL naming conflicts at the destination if necessary.
We recommend that you change the name of your plan in the Copy Planner plans options if a plan with the same name already exists. It will become increasingly difficult for your users to navigate your organization's Planner plans if some of your plans have the same name.