Add an option when changing the price 1 hour of the respective activity, not to affect the past time and already reported hours.
We really like your program. We are a law firm and our payment is based on hours worked. In dynamic economic times such as the current ones, it is necessary to change the prices of hours due to inflation. But when we change them, it turns out that this changes also already reported and paid hours, and we need to keep the archival information, because we make reports for old periods for our customers.
We will be fascinated if there is an opportunity for the same activity, the prices in different periods to be different and when reporting for the old period, the new prices do not affect.