In support I am seeing an influx in tickets asking to change the useful life of the lease after it has been added to a ledger or had in-life changes done, currently it is not possible to edit the useful life once this has been done.
I would suggest we allow an option to edit the useful life of a lease if that lease is extended / reduced, or a note when creating the lease stating something along the lines of: If you want the system to adjust the depreciation over the lifetime of the lease, including extensions or reductions, please enter 0 as the useful life.