Change Organizational Structure

Regards,

I need to change my organizational structure, for example :
Level 1
  Level 2
    Level 3

now

Level 1
   Level 2 (new )
      Level 2.1 ( before Level 2)
         Level 3 ( before level 3 )

What about all the settings you made ​​for Level 2 and Level 3 as well as employees , roles, etc.

Thanks for the reply.