fix: refs #7187 fix duplicate

modules/worker/back/models/device-production-user.js

@@ -5,7 +5,7 @@ module.exports = Self => {
             return new UserError(`This PDA is already assigned to another user`);
 
         if (err.code === 'ER_SIGNAL_EXCEPTION' && err.sqlMessage === 'You can only have one active PDA')
-            return new UserError(`You can only have one active PDA`);
+            return new UserError(err.sqlMessage);
         return err;
     });
 };