After Rollback The Database Upgrade From 12.2 To 12.1, Users can not logon ORA-1017

(Doc ID 2353666.1)

Last updated on JANUARY 26, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.

Symptoms

Users not able to log on after database upgraded to 12.2 and then reverted back to 12.1.

User logins fail with error "ORA-01017: invalid username/password error"

Changes

 Database was upgrade from 12.1 to 12.2.  Then the 12.2 database was reverted back to 12.1

Cause

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