add check for another error message

lib/dialects/postgres/query.js

@@ -252,7 +252,10 @@ module.exports = (function() {
           parent: err
         });
       case '23505':
+        // there are multiple different formats of error messages for this error code
+        // let's make sure to check both that we know about
         match = err.detail.match(/Key \((.*?)\)=\((.*?)\) already exists/);
+        match = match || err.detail.match(/Key \((.*?)\)=\((.*?)\) is duplicated/);
 
         return new sequelizeErrors.UniqueConstraintError({
           fields: match[1].split(', '),