You must upgrade the Identity Manager components in the following sequence:
Designer
iManager
Sentinel Log Management for IGA (you need to perform a migration from EAS to Sentinel Log Management for IGA)
Identity Vault
Identity Manager Engine/Remote Loader
iManager Plug-Ins
Tomcat and PostgreSQL Components
Single Sign-on (One SSO Provider)
Self Service Password Reset
Identity Applications (for Advanced Edition)
Identity Reporting
Analyzer
For information about the latest supported upgrade paths, see the Release Notes for your version from the Identity Manager 4.6 Documentation web site.