when i make changes in record and update, everything gets updated, but Mentee Name goes BLANK.
there is a reason for this as a listbox and not a input or textbox
What is the default value or initial content of the Mentee Name dropdown? It should be parent group’s datatype’s name (or whatever field is being displayed) and as long as your workflow does not change that then it should not go away.
If MenteeNameT is a field on MentorTracking and is of type Mentee then you just need to remove the First Name part. The default value has to be Current Page MentorTracking’s Mentee