You can only delete a data element and other data element objects if no data is associated to the data element itself.
Any data set that you delete from the system is irrevocably lost. All data entry forms, and section forms which may have been developed will also be removed. Make sure that you have made a backup of your database before deleting any data set in case you need to restore it at some point in time.
Open the Maintenance app and find the type of metadata object you want to delete.
In the object list, click the options menu and select Delete .
Click Confirm .