An error occurred while saving the commentSergejs Dombrovskis commented
I just tested this and can securely say - I will not recommend anyone to use Teams Planner as long as there is no version control for the board items.
On top of that a Delete function without confirmation dialog and without Undo/RecycleBin would have been forbidden at Microsoft already in the age of Windows 3.1. It is unbelievable that such UX mistake is present in a Microsoft business product in 2019. This tool is not mature for production environment.