A quick question about an ability (Witch class)

If I were a level 8 witch, would I be able to make a potion of a higher level than mine?

"During your daily preparations, you can create one temporary oil or potion using a formula you know. If you have master proficiency in spell DC, you can create a batch of two temporary oils or potions during your daily preparations, and if you have legendary proficiency, you can create a batch of three. Any items you create this way become inert bottles of liquid the next time you make your daily preparations, and any remaining effects of the temporary items end. A temporary oil or potion has no value."