Renaming exercises

It would be helpful is one could rename excercises. I can always add more exercises with a different name, but if I do so, I lose the workout history. 

One example for the need to chsnge the name is when I do the exercise with a different brand of a machine. It would be helpful if I can rename the exercise by adding the machine brand to the name, and then create a new exercise for the new machine. That way I would not lose the workout history for the old machine. 

For example, in my gym there are at least five leg press machines from five manufacturers, and on anoher gym I visit regularily, there are three more. Each has a slightly different resistance or feel to the exercise. 

Another application would be wheI create a new exercise and I notice a typo in the name; or if I forgot to add which variation of an exercise It It (like medium/light/heavy), or leg position, or exercise cadence, etc. If I want to change the name, I have to delete the exercise (and exercise history) and create the exercise anew.