Oracle Error Message
ORA-10970: backout event for bug 2133357
Reason for 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.
Solution
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.