How to bulk move an issue to another project with issue hierarchy intact?

[Sudipta Panda]

Hi Team,

I have a Project A in which there are Epics, Story, Tasks and Subtasks.

Epics has Stories and Tasks and Task or Stories has Subtask  underneath as hierarchy. 

I want to move all the issues of Project A to Project B keeping the hierarchy intact.

How can I? Cna Bulk Change (Move) retain hierarchy after move?

best of regards

Sudipta