Get Level 2 Effects that don't exist with unlimited time

Level 2 effects that don't exist with unlimited time

*What I expected to happen was...:*
Potions that don't have level 2 parts should not be able to get.

*What actually happened was...:*
I got Level 2 potions that don't exist

*Steps to Reproduce:*
1. DO /effect (player) 16 8000 1
2. You have Night Vision II with unlimited time