Span tags rendered on frontend when a new field has an existing machine name

Problem/Motivation

A span tag "field_ ‎" is being rendered on the frontend, when a new field is being created with an existing machine name.

Issue Reproduction Steps

1. visit admin/structure/comment/manage/comment/fields
2. Add a field with any machine name , say "abcd".
3. Try creating another field with the same machine name "abcd"

Actual Result : A span tag is being rendered wrapping the respective field along with a red border around the field.

Expected Result : The span tag should not have been displayed on the frontend. Only the field with the red border around it should have been displayed here.