Welcome to carnivoretalk @judorick .
We all make mistakes and they can be important in our journey because they are lessons to be learned. They teach us what we can and cannot do. Forget the mistakes but remember the lessons.
Fermented vegetables and cheeses or dairy overall aren’t bad on carnivore unless they cause you to have a setback, stall or overindulge. I eat kimchi and sauerkraut occasionally for my gut microbiome and I occasionally eat a little dairy but I have to be careful with it because it can become very addictive for me. Dairy should be treated as a condiment and not a meal. One thing you’ll find about us is we don’t judge. Eat what works for you.