Oathbreaker knight dead

So I messed up and killed the oathbreaker knight. Does that mean I can't respec if I break my oath again? This is my honor run and need to know if I should respec now so I don't get stuck as a paladin later. Thanks for the help!

I don't think this is a spoiler question as I broke my oath in less than 30 mins into the game by accident 😩