How to move a task to another project?

In the card of a project in Dolibarr 10.0.1 there is a tab “Tasks”. There you can add a new task for that project.
In the life time of projects it often happens, that a reorgnisation is done and it becomes necessary to reorganize the projects also. Especially some open taske have to be moved from one project to another.
How to move a project from one project to another without retyping the task?