Works with CiviCRM 4.4. It might not be supported anymore.
If there is a contact with a b relationship to this contact that has the same kind of membership as this contact, this extension creates a button in the edit membership screen that allows the user set that membership as the parent membership.
Screenshot (click to enlarge)
Releases
Since CiviCRM 5.x, extension releases compatible with CiviCRM 5.0 are compatible with 5.0 and later. An extension release compatible with 5.25, for example, means that it requires CiviCRM 5.25 or later.