Can't delete a custom reference field that I accidentally duplicated under 'categories' on my ecommerse store

Hi I accidentally created a custom reference field under the e-commerce ‘category’ section without realising it was automatically a mandatory field. Now, there is no option to remove it and is now requiring me to link the category to the product twice - as seen in the screenshot. Any idea on how I can remove it? There doesn’t appear to be a delete button under the categories settings.

Here is my public share link: https://preview.webflow.com/preview/tylers-stupendous-project-215a0f?utm_medium=preview_link&utm_source=designer&utm_content=tylers-stupendous-project-215a0f&preview=d61436cdd71dbec4e755af3945f7b2c4&pageId=5d5410a201f72ad0ed0059af&mode=preview