ACS Skills Assessment for new ANZCO Code

Hi everyone

I had a positive skills assessment for Analyst Programmer last year however my current visa is as ICT Business Analsyst. I’m trying to apply for DE and our company’s migration agent advised that I should get a new skills assessment.

I tried applying for another skills assessment for ICT Business Analyst using the same docs from the Analyst Programmer application but the assessor said that my experience is not suitable and is not closely related to ICT BA.

Can I apply for another one with an updated reference letter? I work for one of the big 4 consulting company and these two roles are mostly overlapping depending on the project assigned to.

Given that the old application will be related to the new application, will they not accept any changes to the reference letter?