Applying different interest rates across the payment schedule for lease assets

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Currently you cannot apply different interest rates across the payment schedule for lease assets. This means that you cannot accommodate changes in interest rates in line with the Consumer Price Index. This is a hypothetical scenario for a Leased Asset with a variable interest rate;

Recurring Payment Type	Payment Date	Interest Due Date	Amount	Interest Rate	No of Payments
Periodic Lease Payment	31-Jan-2020	31-Jan-2020	10000	1.8%	12
Periodic Lease Payment	31-Jan-2021	31-Jan-2021	10000	1.9%	12
Periodic Lease Payment	31-Jan-2022	31-Jan-2022	10000	2.0%	12
Periodic Lease Payment	31-Jan-2023	31-Jan-2023	10000	2.1%	12
Periodic Lease Payment	31-Jan-2024	31-Jan-2024	10000	2.2%	12

Has anyone got any suggestions on how to achieve this? The UI only allows for one interest rate across the Lease Payment Schedule.