Oracle : Ошибка ORA-10970

"backout event for bug 2133357"
*Cause: 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.
*Action: 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.

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