ORA-00600: / ORA-00600:  on RECO background after converting NON_CDB to PDB
Last updated on SEPTEMBER 25, 2017
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 and later
Information in this document applies to any platform.
After plugging into a CDB a NON-CDB database, RECO process start reporting an ORA-00600:  and/or ORA-00600: 
Database has been converted to a PDB from a NON-CDB.
Sign In with your My Oracle Support account
Don't have a My Oracle Support account? Click to get started
My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms