ORA-26097: unsupported conversion for column SYS_NC0001500016$ (from type 58 to type 23)

facing below error, while importing data for tables having nested tables.

ORA-31693: Table data object <table_name> failed to load/unload and is being skipped due to error:
ORA-02354: error in exporting/importing data
ORA-26097: unsupported conversion for column SYS_NC0001500016$ (from type 58 to type 23)

Please suggest.

Regards,
Vara.

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