Cause:

An UPDATE or INSERT statement attempted to insert a duplicate key. For Trusted Oracle configured in DBMS MAC mode, you may see this message if a duplicate entry exists at a different level.

You tried to execute An UPDATE or INSERT statement that has created a duplicate value in a field restricted by a unique index

Action:

Either remove the unique restriction or do not insert the key.

To Resolve this oracle error do the following

1.Modify your SQL INSERT or UPDATE statement so that a duplicate value is not created

2.Change the constraint to allow duplicate values

3. Drop the unique constraint

You can run the following SQL statement to identify  which unique constraint was violated:

SQL>SELECT distinct table_name FROM all_indexes WHERE index_name=’CONSTRAINT_NAME’;

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