@finemindorg, please be informed that once the meta data is collected in your system you cannot delete them like you should be able to with other variables. You could however control the collection of these meta-data by unchecking them from your account as outlined here:
There are however other meta-data (like the _version_, _id, _uuid, _submission_time, _submitted_by) which is controlled by the system (to manage the data within the system). These are mandatory (for the system) and you should not be able to control them.
