dup err 이네요

-268    Unique constraint constraint-name violated.

During execution of this statement, a duplicate value was introduced
into a column or columns that a unique constraint protects. The row
with the duplicate value was not allowed into the table (not inserted
or not updated). For Informix Dynamic Server, any changes that this
statement made prior to the discovery of the duplicate value have been
rolled back. (The effects of preceding statements in the transaction, if
there were any, remain in effect. They must be explicitly rolled back or
committed.)

This error occurs in a logging database. However, if you are using
repeatable read isolation, error -239 will display instead.