We don’t use the field in the front template, only the back template. The “Steckbrief” is an additional field for more information. “Stockbrot” is still in the card back template, even though I deleted it. If we can’t delete fields from the editor yet, it’s not a problem.
I can’t find it on the back template too, unless if I’m checking the wrong note type. Can you post a screenshot of your template where the field is found?