Can't save default values for web content because of required fields

Issue

• When the user tries to edit the default values of the structure field, they receive an error and the updated default values are not saved.
• Steps to reproduce:
  1) Set up DXP 7.4
  2) Navigate to Content & Data -> Web Content -> Structures and create a structure with 2 fields (for example, 2 text fields) and make one of the fields 'Required' then save it
  3) Navigate to structures and click on the 3 dot menu and select 'Edit Default Values'.
  4) Type in the field that is not required any text and click save.
  Observed Behavior: The structure is not saved and an error in the UI is thrown:

  Error: Please enter a valid title for the default language: en-US.
  "The field is required"

  No errors in the log and browser console.
  Expected Behavior: The updated structure should be saved successfully.

Environment

• Liferay DXP 7.4

Resolution

• The observed behavior is a known bug of DXP 7.4 which is addressed in Liferay-dxp-7.4-update-30

Additional Information

• If a hotfix is required, please create a support ticket requesting the hotfix by attaching the patch details.
• Installing Fix Packs and Hotfixes on Liferay DXP will guide you to install the Fixpack/Hotfix in your environment.
• LPS-154572