It is not possible for users to make any changes after a design has been certified to ensure the integrity and transparency of the LCAs. The only way for a user to update the design is to duplicate the design, make your changes and submit the cloned design for certification.

If any recommendation improvements were recorded against the original certified design in an improved design, you may need to re-run & re-record all the recommendations so that the numbers are balanced for the LCA report to be consistent.