project transaction source setup with wrong expenditure type class

Summary:

We have a payroll system that we setup as a project transaction source, but we are running into issues changing the expenditure type class to accurately reflect the payroll on project reporting

Content (please ensure you mask any confidential information):

Is it possible to update this? Or how best to fix this? Do we need a new document entry? or does it require a whole new document/source?

Version (include the version you are using, if applicable):

23D

Code Snippet (add any code snippets that support your topic, if applicable):

NA