How to fix the Oracle error ORA-02299: cannot validate (string.string) – duplicate keys found?

In this post, you’ll learn more about the Oracle ErrorORA-02299: cannot validate (string.string) – duplicate keys found with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-02299: cannot validate (string.string) – duplicate keys found

Reason for the Error ORA-02299: cannot validate (string.string) – duplicate keys found

an alter table validating constraint failed because the table has duplicate key values.

How to fix the Error ORA-02299: cannot validate (string.string) – duplicate keys found ?

You can fix this error in Oracle by following the below steps

Obvious