ORA Database Error Messages ORA-02299: cannot validate (string.string) โ duplicate keys found June 17, 2015 mpbod ORA-02299: cannot validate (string.string) โ duplicate keys found Cause: an alter table validating constraint failed because the table has duplicate key values. Action: Obvious Back to previous menu https://support.oracle.com/ http://www.oracle.com/ Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)