Mail Application To Do List Feature

So I'm trying this new feature on my MacBook the feature in the Mail Application. The to do list when I write the stuff I need to do then click on "To Do List" for the square so I can check off when I'm done. I get this pop up I will attach below. I get the pop up about 20 times and how can I fix it.

Some how Mail is finding your Gmail to do list and trying to sync it with your Mail to do list.

Mail has found a conflict between the to do lists and wants to know whether you would like to keep the version of your to do on the server aka gmail or local aka Mail

The choice is yours

There is no other "To Do List" in my Gmail account

And that pop up doesn't go away even if I select an option.

Thanks for replying