Oracle Solution for Error ora-10970

ORA-10970: backout event for bug 2133357

What triggered the Error:

2133357 dynamically sets the varying width flag and character width. Lob data which is not migrated during migration from single byte to multibyte charater set will be displayed as special characters.

What should we do to fix it:

To help migrate lob data which was not migrated during migration by backing out 2133357, so lob data can be selected and moved to multibyte character set.