I would like to be able to save a workout with the same title.

I would recommend a subtitle to be added to differentiate the session. This would save having to edit workouts too.

Example below are two sessions but the structure of the session is different.

Example.

Title - Run test to establish your Threshold and Zones
Sub Title - 20 Minute test

Title - Run test to establish your Threshold and Zones
Sub Title - 20 Minute test. Shorter warm up and cool down period.