Change Enterprise Project Type in Project Server 2016 using CSOM or SharePoint Designer Workflow

I've covered below steps in Project Server 2016:

1. Created a default Enterprise Project Type - 1 and Stage 1.

2. Create a workflow in SharePoint Designer 2013 and associated with EPT1.

3. Assigned PDP.

4. I need to transit to next EPT2 and Stage2 from workflow of Stage1. 

I am looking for support that How to change Enterprise Project Type (EPT) in Project Server 2016 using CSOM or SharePoint Designer Workflow.