At any point, with the corresponding system permission, you can clear all the data entered in a study.
Note: Removing data of any kind can be a risk. This allows you to remove data from a study that is NOT live.
All data can only be removed from a study In Development.
Reasons for doing this might include:
Clearing out previous data entered for testing purposes.
Changing specific study functions that are otherwise disabled when there is data present in the study.