Why we cannot adjust unit for lease asset

Summary:

Our lease asset charges to 3 cost centers,

unit depreciation expense account

0.9538 HK178

0.0257 HK104

0.0205 HK106

We need to update the unit periodically but system not allow us to adjust unit with following error :

You can't perform this transaction on a leased asset.

May I know the reason not allow adjust unit for lease asset? What is the normal practice to handle distribution of lease expenses?

Thank you.

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