ORA Database Error Messages ORA-02429: cannot drop index used for enforcement of unique/primary key June 19, 2015 mpbod ORA-02429: cannot drop index used for enforcement of unique/primary key Cause: user attempted to drop an index that is being used as the enforcement mechanism for unique or primary key. Action: drop the constraint instead of the index. 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)