By looking at the screenshot. The user can be bel to tell the name of the field that need to be corrected. with the field name been specified. e.g. Summary: You must specify the issue unlike customfield_10200: Acceptance Criteria is required.
Questions
What did I need to do to make the Acceptance Criteria come in place of the customfield_10200. So that users can be able to find the error using custom field name and not number.

